Bring ia64 back from the dead. After a call one needs to restore the

GP register, because it's clobbered for calls across load modules. The
previous commit inserted the call to _init_tls() between the call to
atexit() and the restoration of the GP register clobbered by it. Fix:
restore GP before we call _init_tls().

Pointy hat: dfr@

lib/csu/ia64/crt1.S

@@ -108,7 +108,7 @@ _start:
 		;;
 }
 {		.mfb
-		nop		0
+		mov		gp=GP
 		nop		0
 		br.call.sptk	b0=_init_tls
 }