Push definitions down a level to avoid macos

I guess the previous lint failure was about avoiding #[cfg], and doing
this instead.

src/unix/bsd/freebsdlike/mod.rs

@@ -1245,6 +1245,10 @@ extern {
     pub fn uselocale(loc: ::locale_t) -> ::locale_t;
     pub fn utimensat(dirfd: ::c_int, path: *const ::c_char,
                      times: *const ::timespec, flag: ::c_int) -> ::c_int;
+    pub fn sendmmsg(sockfd: ::c_int, msgvec: *mut ::mmsghdr, vlen: ::c_uint,
+                    flags: ::c_int) -> ::c_int;
+    pub fn recvmmsg(sockfd: ::c_int, msgvec: *mut ::mmsghdr, vlen: ::c_uint,
+                    flags: ::c_int, timeout: *mut ::timespec) -> ::c_int;
 }
 
 #[link(name = "util")]

src/unix/bsd/mod.rs

@@ -594,13 +594,6 @@ extern {
     pub fn recvmsg(fd: ::c_int, msg: *mut ::msghdr, flags: ::c_int)
                    -> ::ssize_t;
 
-    #[cfg_attr(not(target_os = "macos"))]
-    pub fn sendmmsg(sockfd: ::c_int, msgvec: *mut ::mmsghdr, vlen: ::c_uint,
-                    flags: ::c_int) -> ::c_int;
-    #[cfg_attr(not(target_os = "macos"))]
-    pub fn recvmmsg(sockfd: ::c_int, msgvec: *mut ::mmsghdr, vlen: ::c_uint,
-                    flags: ::c_int, timeout: *mut ::timespec) -> ::c_int;
-
     pub fn sync();
     #[cfg_attr(target_os = "solaris", link_name = "__posix_getgrgid_r")]
     pub fn getgrgid_r(uid: ::uid_t,

src/unix/bsd/netbsdlike/mod.rs

@@ -719,6 +719,10 @@ extern {
     pub fn getdomainname(name: *mut ::c_char, len: ::size_t) -> ::c_int;
     pub fn setdomainname(name: *const ::c_char, len: ::size_t) -> ::c_int;
     pub fn uname(buf: *mut ::utsname) -> ::c_int;
+    pub fn sendmmsg(sockfd: ::c_int, msgvec: *mut ::mmsghdr, vlen: ::c_uint,
+                    flags: ::c_int) -> ::c_int;
+    pub fn recvmmsg(sockfd: ::c_int, msgvec: *mut ::mmsghdr, vlen: ::c_uint,
+                    flags: ::c_int, timeout: *mut ::timespec) -> ::c_int;
 }
 
 cfg_if! {