fix_testandset_amd64.patch

Index: x86_64/__testandset.S
===================================================================
RCS file: /cvs/dietlibc/x86_64/__testandset.S,v
retrieving revision 1.3
diff -u -p -r1.3 __testandset.S
--- x86_64/__testandset.S	25 Jan 2016 19:04:48 -0000	1.3
+++ x86_64/__testandset.S	7 Feb 2016 00:31:29 -0000
@@ -9,7 +9,5 @@
 __testandset:
 	xorl	%eax,%eax
 	incl	%eax
-	xchg	%rax,(%rdi)
+	xchg	%eax,(%rdi)
 	ret
-
-link_warning("__testandset", "warning: __testandset() was never tested!")