fix fallout of asm/elf.h removal in kernel

since the kernel no longer provides asm/elf.h, the
sys/procfs.h from the 
common code, alpha, and sh fail when used.  this should
things up.
-mike

2008-06-07  Mike Frysinger  <vapiergentoo.org>

	* sysdeps/unix/sysv/linux/sys/procfs.h: Replace with #error
stub.
	* sysdeps/unix/sysv/linux/alpha/sys/procfs.h: Copy some
asm/elf.h
	definitions from the kernel header to sys/procfs.h and
remove the
	#include of asm/elf.h.
	* sysdeps/unix/sysv/linux/sh/sys/procfs.h: Likewise.