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-x86/asm/shmparam.h b/libc/kernel/arch-x86/asm/shmparam.h
index 43fd83e..f761606 100644
--- a/libc/kernel/arch-x86/asm/shmparam.h
+++ b/libc/kernel/arch-x86/asm/shmparam.h
@@ -18,6 +18,6 @@
  ****************************************************************************/
 #ifndef _ASM_X86_SHMPARAM_H
 #define _ASM_X86_SHMPARAM_H
-#define SHMLBA PAGE_SIZE  
+#define SHMLBA PAGE_SIZE
 #endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */