Haiku: Fix constants for S_IFIFO and S_IFCHR

Some updates for vxWorks

adding FIOGETNAME which is used by ioctl() to get file path
adding PATH_MAX
use type c_int for _PARM_NAME_MAX and _PARM_PATH_MAX

adding PATH_MAX

use type c_int for _PARM_NAME_MAX and _PARM_PATH_MAX

sync with rust-lang/libc master

Add `pthread_main_np` to FreeBSD-like and `_lwp_self` to NetBSD

Sync to rust-lang/libc master

update rtpSpawn prototype

Fix max_align_t

Sync to rust-lang/libc branch master

VxWorks libc cleanups and fixes for some libc-test issues

move rtpSpawn and RTP_ID_ERROR from libstd to libc

use union for unions

Add environment variable FILTER to choose which target(s) to run

Sync to rust-lang/libc master

Skip max_align_t in FreeBSD10

This error was able to land because FreeBSD10 is not checked by bors yet (see: RCS PR: https://github.com/rust-lang/rust-central-station/pull/481) .

Fixes

Two patches fixing minor issues.

Add FreeBSD10 support

This adds libc-test support for Freebsd10 and a CI build job that tests
FreeBSD10 with LIBC_CI only.

cc @asomers this is a follow up to #1491 .

VxWorks libc cleanups and fixes for some libc-test issues that were p…

Implement max_align_t

Implement `max_align_t` for windows and unix targets.

WIP: at this stage I just want to see what breaks.