Clean up trailing whitespace in the kernel headers.

And fix the scripts so they stop letting trailing whitespace through.

Change-Id: Ie109fbe1f63321e565ba0fa60fee8e9cf3a61cfc
diff --git a/libc/kernel/common/linux/swap.h b/libc/kernel/common/linux/swap.h
index 0f8e546..3fb15cc 100644
--- a/libc/kernel/common/linux/swap.h
+++ b/libc/kernel/common/linux/swap.h
@@ -27,7 +27,7 @@
 #include <asm/atomic.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <asm/page.h>
-#define SWAP_FLAG_PREFER 0x8000  
+#define SWAP_FLAG_PREFER 0x8000
 #define SWAP_FLAG_PRIO_MASK 0x7fff
 #define SWAP_FLAG_PRIO_SHIFT 0
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */