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-mips/asm/shmparam.h b/libc/kernel/arch-mips/asm/shmparam.h
index d5ec78f..912ae04 100644
--- a/libc/kernel/arch-mips/asm/shmparam.h
+++ b/libc/kernel/arch-mips/asm/shmparam.h
@@ -19,6 +19,6 @@
 #ifndef _ASM_SHMPARAM_H
 #define _ASM_SHMPARAM_H
 #define __ARCH_FORCE_SHMLBA 1
-#define SHMLBA 0x40000  
+#define SHMLBA 0x40000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif