Sort the syscalls.mk files, give all generated files the same header.
No non-comment changes to the .S files.
Change-Id: Iafcfd004c3ea92b64268f80ab16df615b97cefac
diff --git a/libc/arch-x86/syscalls/read.S b/libc/arch-x86/syscalls/read.S
index d817191..8d63762 100644
--- a/libc/arch-x86/syscalls/read.S
+++ b/libc/arch-x86/syscalls/read.S
@@ -1,4 +1,5 @@
-/* autogenerated by gensyscalls.py */
+/* Generated by gensyscalls.py. Do not edit. */
+
#include <asm/unistd.h>
#include <linux/err.h>
#include <machine/asm.h>