Add SysV semaphore constants

(backport <rust-lang#4286>)
(cherry picked from commit f84f618)

Author: bertptrs

libc-test/semver/linux.txt

@@ -885,6 +885,11 @@ GENL_ID_CTRL
 GENL_MAX_ID
 GENL_MIN_ID
 GENL_NAMSIZ
+GETALL
+GETNCNT
+GETPID
+GETVAL
+GETZCNT
 GLOB_ABORTED
 GLOB_APPEND
 GLOB_DOOFFS
@@ -2744,6 +2749,12 @@ SEEK_DATA
 SEEK_HOLE
 SELFMAG
 SEM_FAILED
+SEM_INFO
+SEM_STAT
+SEM_STAT_ANY
+SEM_UNDO
+SETALL
+SETVAL
 SFD_CLOEXEC
 SFD_NONBLOCK
 SHM_EXEC

src/unix/linux_like/linux/mod.rs

@@ -3018,6 +3018,19 @@ pub const MSG_NOERROR: c_int = 0o10000;
 pub const MSG_EXCEPT: c_int = 0o20000;
 pub const MSG_ZEROCOPY: c_int = 0x4000000;
 
+pub const SEM_UNDO: c_int = 0x1000;
+
+pub const GETPID: c_int = 11;
+pub const GETVAL: c_int = 12;
+pub const GETALL: c_int = 13;
+pub const GETNCNT: c_int = 14;
+pub const GETZCNT: c_int = 15;
+pub const SETVAL: c_int = 16;
+pub const SETALL: c_int = 17;
+pub const SEM_STAT: c_int = 18;
+pub const SEM_INFO: c_int = 19;
+pub const SEM_STAT_ANY: c_int = 20;
+
 pub const SHM_R: c_int = 0o400;
 pub const SHM_W: c_int = 0o200;