9704 move socket functions to libc

*** 27,40 ****
   * Use is subject to license terms.
   */
  
          .file   "_so_recvfrom.s"
  
- /* C library -- __so_recvfrom                                   */
  /*
!  * int __so_recvfrom(int sock, void *buffer, size_t len, int flags,
!  *               struct sockaddr *addr, size_t *addrlen)
   */
  
  #include "SYS.h"
  
          SYSCALL2_RESTART_RVAL1(__so_recvfrom,recvfrom)
--- 27,41 ----
   * Use is subject to license terms.
   */
  
          .file   "_so_recvfrom.s"
  
  /*
!  * C library -- __so_recvfrom
!  *
!  * ssize_t __so_recvfrom(int, void *, size_t, int, struct sockaddr *,
!  *     socklen_t *)
   */
  
  #include "SYS.h"
  
          SYSCALL2_RESTART_RVAL1(__so_recvfrom,recvfrom)