common/bits: Fix ipc_perm and semid_ds definitions for 64-bit arches

It fixes:

FAIL sem got 1 expected 0
	failed: incorrect sem_nsems!
	semget(IPC_CREAT) = 0
	semctl(k) = 0
	sem_nsems = 0

for aarch64.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>

libc/sysdeps/linux/common/bits/ipc.h

@@ -20,6 +20,7 @@
 #endif
 
 #include <bits/types.h>
+#include <bits/wordsize.h>
 
 /* Mode bits for `msgget', `semget', and `shmget'.  */
 #define IPC_CREAT	01000		/* Create key if key does not exist. */
@@ -46,8 +47,12 @@ struct ipc_perm
     __gid_t gid;			/* Owner's group ID.  */
     __uid_t cuid;			/* Creator's user ID.  */
     __gid_t cgid;			/* Creator's group ID.  */
+#if __WORDSIZE == 64
+    unsigned  int mode;
+#else
     unsigned short int mode;		/* Read/write permission.  */
     unsigned short int __pad1;
+#endif
     unsigned short int __seq;		/* Sequence number.  */
     unsigned short int __pad2;
     unsigned long int __unused1;

libc/sysdeps/linux/common/bits/sem.h

@@ -20,6 +20,7 @@
 #endif
 
 #include <sys/types.h>
+#include <bits/wordsize.h>
 
 /* Flags for `semop'.  */
 #define SEM_UNDO	0x1000		/* undo the operation on exit */
@@ -39,9 +40,13 @@ struct semid_ds
 {
   struct ipc_perm sem_perm;		/* operation permission struct */
   __time_t sem_otime;			/* last semop() time */
+#if __WORDSIZE == 32
   unsigned long int __unused1;
+#endif
   __time_t sem_ctime;			/* last time changed by semctl() */
+#if __WORDSIZE == 32
   unsigned long int __unused2;
+#endif
   unsigned long int sem_nsems;		/* number of semaphores in set */
   unsigned long int __unused3;
   unsigned long int __unused4;