9704 move socket functions to libc

*** 27,38 ****
   * Use is subject to license terms.
   */
  
          .file   "_so_sendmsg.s"
  
! /* C library -- __so_sendmsg                                            */
! /* int __so_sendmsg(int sock, const struct msghdr *msg, int flags)      */
  
  #include "SYS.h"
  
          SYSCALL2_RESTART_RVAL1(__so_sendmsg,sendmsg)
          RET
--- 27,41 ----
   * Use is subject to license terms.
   */
  
          .file   "_so_sendmsg.s"
  
! /*
!  * C library -- __so_sendmsg
!  *
!  * ssize_t __so_sendmsg(int, const struct msghdr *, int)
!  */
  
  #include "SYS.h"
  
          SYSCALL2_RESTART_RVAL1(__so_sendmsg,sendmsg)
          RET