Define for Arm, PowerPC and SH if kernel is 2.4.4 or newer.
* sysdeps/unix/sysv/linux/bits/socket.h (PF_WANPIPE): New, from
Linux 2.4.4.
(AF_WANPIPE): Likewise.
(MSG_MORE): New.
* sysdeps/unix/sysv/linux/alpha/bits/socket.h: Add same changes as
for Linux generic version.
* sysdeps/unix/sysv/linux/s390/s390-64/bits/socket.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/socket.h: Likewise.
* sysdeps/unix/sysv/linux/mips/bits/socket.h: Likewise.
* sysdeps/unix/sysv/linux/ia64/bits/socket.h: Likewise.
* sysdeps/gnu/netinet/tcp.h (TCP_QUICKACK): New.