syscall: Add socketpair to syscall.csv

Summary:
- This commit adds socketpair to syscall.csv

Impact:
- None

Testing:
- Tested with adb (not merged net)

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

include/sys/syscall_lookup.h

@@ -371,6 +371,7 @@ SYSCALL_LOOKUP(futimens,                   2)
   SYSCALL_LOOKUP(sendmsg,                  3)
   SYSCALL_LOOKUP(setsockopt,               5)
   SYSCALL_LOOKUP(socket,                   3)
+  SYSCALL_LOOKUP(socketpair,               4)
 #endif
 
 /* The following is defined only if CONFIG_TASK_NAME_SIZE > 0 */

syscall/syscall.csv

@@ -164,6 +164,7 @@
 "sigtimedwait","signal.h","","int","FAR const sigset_t *","FAR struct siginfo *","FAR const struct timespec *"
 "sigwaitinfo","signal.h","","int","FAR const sigset_t *","FAR struct siginfo *"
 "socket","sys/socket.h","defined(CONFIG_NET)","int","int","int","int"
+"socketpair","sys/socket.h","defined(CONFIG_NET)","int","int","int","int","int *"
 "stat","sys/stat.h","","int","FAR const char *","FAR struct stat *"
 "statfs","sys/statfs.h","","int","FAR const char *","FAR struct statfs *"
 "symlink","unistd.h","defined(CONFIG_PSEUDOFS_SOFTLINKS)","int","FAR const char *","FAR const char *"