re-instate a small part of this previously removed patch; enough to get

libffi building again on arm.

tested by patrick@

devel/libffi/patches/patch-src_arm_sysv_S

@@ -0,0 +1,14 @@
+$OpenBSD: patch-src_arm_sysv_S,v 1.5 2013/05/07 20:41:23 jasper Exp $
+
+Error: unknown pseudo-op: `.pad'
+
+--- src/arm/sysv.S.orig	Tue May  7 22:01:36 2013
++++ src/arm/sysv.S	Tue May  7 22:01:57 2013
+@@ -243,7 +243,6 @@ ARM_FUNC_START ffi_closure_SYSV
+ 	stmfd	sp!, {ip, lr}
+ 	UNWIND .save	{r0, lr}
+ 	add	r2, sp, #8
+-	.pad #16
+ 	sub	sp, sp, #16
+ 	str	sp, [sp, #8]
+ 	add	r1, sp, #8