Update sysvipc kernel-features.h files for Linux 5.1

Linux 5.1 adds missing SySV IPC syscalls to the syscall table for
remanining one that still uses the ipc syscall on glibc (m68k, mips-o32,
powerpc, s390, sh, and sparc32).  However the newly added direct ipc
syscall are different than the old ones:

  1. They do not expect IPC_64, meaning __IPC_64 should be set to zero
     when new syscalls are used.  And new syscalls can not be used
     for compat functions like __old_semctl (to emulated old sysvipc it
     requires to use the old __NR_ipc syscall without __IPC_64).
     Thus IPC_64 is redefined for newer kernels on affected ABIs.

  2. semtimedop and semop does not exist on 32-bit ABIs (only
     semtimedop_time64 is supplied).  The provided syscall wrappers only
     uses the wire-up syscall if __NR_semtimedop and __NR_semop are
     also defined.

Checked on x86_64-linux-gnu and i686-linux-gnu on both a 4.15 kernel
configure with default options and sysvipc tests on a 5.3.0 kernel with
--enable-kernel=5.1.

Tested-by: Paul A. Clarke <pc@us.ibm.com>

sysdeps/unix/sysv/linux/semtimedop.c

@@ -27,7 +27,9 @@ int
 __semtimedop (int semid, struct sembuf *sops, size_t nsops,
 	      const struct timespec *timeout)
 {
-#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+  /* semtimedop wire-up syscall is not exported for 32-bit ABIs (they have
+     semtimedop_time64 instead with uses a 64-bit time_t).  */
+#if defined __ASSUME_DIRECT_SYSVIPC_SYSCALLS && defined __NR_semtimedop
   return INLINE_SYSCALL_CALL (semtimedop, semid, sops, nsops, timeout);
 #else
   return INLINE_SYSCALL_CALL (ipc, IPCOP_semtimedop, semid,