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/tsc.h b/libc/kernel/arch-x86/asm/tsc.h
index e99a1a5..e34f6d1 100644
--- a/libc/kernel/arch-x86/asm/tsc.h
+++ b/libc/kernel/arch-x86/asm/tsc.h
@@ -19,8 +19,8 @@
 #ifndef _ASM_X86_TSC_H
 #define _ASM_X86_TSC_H
 #include <asm/processor.h>
-#define NS_SCALE 10  
+#define NS_SCALE 10
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define US_SCALE 32  
+#define US_SCALE 32
 typedef unsigned long long cycles_t;
 #endif