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/compiler.h b/libc/kernel/common/linux/compiler.h
index 9e6dc4b..1d913b7 100644
--- a/libc/kernel/common/linux/compiler.h
+++ b/libc/kernel/common/linux/compiler.h
@@ -39,7 +39,7 @@
 #define __cond_lock(x) (x)
 #endif
 #ifndef __attribute_const__
-#define __attribute_const__  
+#define __attribute_const__
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
 #endif