Add a bunch more missing ENDs to assembler routines.

This isn't everything; I've missed out those x86 files that are

Change-Id: Idb7bb1a68796d6c0b70ea2b5c3300e49da6c62d2
diff --git a/libc/arch-x86/string/strcmp.S b/libc/arch-x86/string/strcmp.S
index 22ba546..5d3f4fc 100644
--- a/libc/arch-x86/string/strcmp.S
+++ b/libc/arch-x86/string/strcmp.S
@@ -79,3 +79,4 @@
 	movzbl	(%edx),%edx
 	subl	%edx,%eax
 	ret
+END(strcmp)