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/arch-arm/asm/shmparam.h b/libc/kernel/arch-arm/asm/shmparam.h
index 4061915..c01b413 100644
--- a/libc/kernel/arch-arm/asm/shmparam.h
+++ b/libc/kernel/arch-arm/asm/shmparam.h
@@ -18,7 +18,7 @@
  ****************************************************************************/
 #ifndef _ASMARM_SHMPARAM_H
 #define _ASMARM_SHMPARAM_H
-#define SHMLBA (4 * PAGE_SIZE)  
+#define SHMLBA (4 * PAGE_SIZE)
 #define __ARCH_FORCE_SHMLBA
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif