Auto merge of #2620 - rtzoeller:android_posix_vdisable, r=Amanieu

Android defines _POSIX_VDISABLE

https://github.com/aosp-mirror/platform_bionic/blob/c44b1d0676ded732df4b3b21c5f798eacae93228/libc/include/bits/posix_limits.h#L95

Author: bors

libc-test/semver/android.txt

@@ -2444,6 +2444,7 @@ _PC_REC_XFER_ALIGN
 _PC_SYMLINK_MAX
 _PC_SYNC_IO
 _PC_VDISABLE
+_POSIX_VDISABLE
 _SC_2_CHAR_TERM
 _SC_2_C_BIND
 _SC_2_C_DEV

src/unix/linux_like/android/mod.rs

@@ -812,6 +812,8 @@ pub const TFD_TIMER_CANCEL_ON_SET: ::c_int = 2;
 
 pub const USER_PROCESS: ::c_short = 7;
 
+pub const _POSIX_VDISABLE: ::cc_t = 0;
+
 // linux/falloc.h
 pub const FALLOC_FL_KEEP_SIZE: ::c_int = 0x01;
 pub const FALLOC_FL_PUNCH_HOLE: ::c_int = 0x02;