It needs to be skipped during testing because there's no way to include
a combination of headers that will expose it without giving a "type has
already been defined" error.

Make changes to reflect this

vfork, wait4, getresuid, getresgid, personality, vhangup,
swapon, swapoff, getdomainname, setdomainname, iopl, ioperm

Fixed the issues that prevented the libc_tests that are generated from passing. Also, fixed struct names and types to be representative of the linux source files.

_GNU_SOURCE works differently than other libraries and creates
function pointer issues

The default  on OS X does not provide clear errors,
instead the NOCANCEL variants should be used. These are available
as of OS X 10.6 onwards.

There is a compatibility issue regarding the type of a flag parameter:
int vs uint. Linux does declare the syscall to use uint and musl
followed it, but it is incompatible with other POSIX recv*/send*
syscalls. So it seems to be wise to follow the glibc version of
prototypes with int.

Signed-off-by: NODA, Kai <nodakai@gmail.com>

Some notes about the particularities of the changes:

res_init has been deprecated in favor of res_ninit, and many (but not
all) targets have therefore renamed the link name to __res_init. For
example, this happened in glibc in version 2.2:
https://bugzilla.redhat.com/show_bug.cgi?id=43822#c6
In these systems, res_init is #defined to __res_init in resolv.h, which
lets existing C programs continue to be compiled.

Unfortunately, this define doesn't automatically apply to our Rust code.
We therefore need to manually map the link name of res_init as
appropriate for each target:

macOS and iOS use res_9_init: https://github.com/practicalswift/osx/blob/3908694d6328baa293f0d7fc337348c01d13ed8f/src/libresolv/resolv.h#L316
Solaris uses res_init: https://java.net/projects/solaris/sources/on-src/content/usr/src/head/resolv.h
OpenBSD uses __res_init: https://github.com/openbsd/src/blob/f3b3b7c7ca9a921db3a5650eed40f2b2e4d731d8/include/resolv.h#L268
FreeBSD uses __res_init: https://github.com/freebsd/freebsd/blob/6911f4a88c9832e5985b788f5e84010424f9e020/include/resolv.h#L290
NetBSD uses __res_init: http://ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/include/resolv.h
glibc uses __res_init: https://github.com/lattera/glibc/blob/a2f34833b1042d5d8eeb263b4cf4caaea138c4ad/resolv/resolv.h#L259
eglibc uses __res_init: https://github.com/Xilinx/eglibc/blob/7f0bcce417c47aefad06ddfec7cd4ced3a4e10ff/resolv/resolv.h#L259
musl uses res_init: https://github.com/runtimejs/musl-libc/blob/0a11d7cb13e243782da36e2e5747b8b151933cca/include/resolv.h#L128
Android uses res_init: https://github.com/android/platform_bionic/blob/306ea559528255e19a5bcd68cc2a9b1afc2cfb27/libc/include/resolv.h#L57

One caveat here is that NetBSD doesn't seem to use the symbol name
__res_init yet, despite the redefine being present in resolv.h. At least
Travis fails for the netbsd target if __res_init is used. This may
change in the future.

iOS and macOS both unfortunately require linking with libresolv, despite
the symbols technically being available without libresolv:
resolv: http://blog.achernya.com/2013/03/os-x-has-silly-libsystem.html
Android and OpenBSD fall in the same category.

              INFO for the patch:
FREEBSD [https://github.com/freebsd/freebsd]

        /sys/sys/_types.h
typedef    long        __key_t;

        /sys/sys/types.h
typedef    __key_t        key_t;

        /sys/sys/ipc.h

struct ipc_perm {
    uid_t        cuid;
    gid_t        cgid;
    uid_t        uid;
    gid_t        gid;
    mode_t        mode;
    unsigned short    seq;
    key_t        key;
};

key_t    ftok(const char *, int);

        /sys/sys/msg.h

typedef    unsigned long    msglen_t;
typedef    unsigned long    msgqnum_t;

struct msqid_ds {
	struct	ipc_perm msg_perm;
	struct	msg *msg_first;
	struct	msg *msg_last;
	msglen_t msg_cbytes;
	msgqnum_t msg_qnum;
	msglen_t msg_qbytes;
	pid_t	msg_lspid;
	pid_t	msg_lrpid;
	time_t	msg_stime;
	time_t	msg_rtime;
	time_t	msg_ctime;
};

struct msg {
	struct	msg *msg_next;
	long	msg_type;
	u_short	msg_ts;
	short	msg_spot;
	struct	label *label;
};

struct msginfo {
    int    msgmax,
        msgmni,
        msgmnb,
        msgtql,
        msgssz,
        msgseg;
};

int msgctl(int, int, struct msqid_ds *);
int msgget(key_t, int);
ssize_t msgrcv(int, void *, size_t, long, int);
int msgsnd(int, const void *, size_t, int);

        /sys/sys/shm.h

typedef unsigned int shmatt_t;

struct shmid_ds {
    struct ipc_perm shm_perm;
    size_t          shm_segsz;
    pid_t           shm_lpid;
    pid_t           shm_cpid;
    shmatt_t        shm_nattch;
    time_t          shm_atime;
    time_t          shm_dtime;
    time_t          shm_ctime;
};

void *shmat(int, const void *, int);
int shmget(key_t, size_t, int);
int shmctl(int, int, struct shmid_ds *);
int shmdt(const void *);

	/sys/security/mac/mac_internal.h
struct label {
	int		l_flags;
	intptr_t	l_perpolicy[MAC_MAX_SLOTS];
};

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- some tests are failing
- remove readlink, timegm and sig* functions in favor of the
  unix/mod.rs definitions
- remove time64_t (it is not defined for aarch64)
- move some definitions to android/b32.rs and create appropriated
  definitions in android/b64.rs

```
export TARGET=x86_64-unknown-openbsd
export QEMU=openbsd.qcow2
sh ci/run-docker.sh $TARGET
```
Passes when run localy.

Adding `termios.h` behind `rpcsvc/rex.h` does not solve the #define
clash since `rex.h` also defines the `_SYS_TERMIOS_H_` include guard.

Attempting to correct for conflicting defines from `rpcsvc/rex.h`

https://developer.apple.com/library/content/releasenotes/General/APIDiffsMacOS10_12/Swift/Darwin.html
Fixes https://github.com/rust-lang/libc/issues/480

This helps caching between runs and can help speed up turnaround time for
various operations. The old android container didn't work out for some reason
due to permissions so the definition has now been vendored locally to just
rebuild it each time.

FreeBSD svn r262489 removed some *_MAXID definitions in sys/sysctl.h.  They never
should've been used outside of the FreeBSD base system anyway.  Mark them as
deprecated, hide them from the API docs, and disable their tests.

r273250 removed MAP_RENAME and MAP_NORESERVE, flags used by mmap(2), but old
binaries that use them will still work.  Suppress their test errors.

r294930 changed stack_t.ss_sp from a char* to a void*.  Suppress its test error.