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/cachectl.h b/libc/kernel/arch-mips/asm/cachectl.h
index 458c00d..6cc6f28 100644
--- a/libc/kernel/arch-mips/asm/cachectl.h
+++ b/libc/kernel/arch-mips/asm/cachectl.h
@@ -18,11 +18,11 @@
  ****************************************************************************/
 #ifndef _ASM_CACHECTL
 #define _ASM_CACHECTL
-#define ICACHE (1<<0)  
-#define DCACHE (1<<1)  
+#define ICACHE (1<<0)
+#define DCACHE (1<<1)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define BCACHE (ICACHE|DCACHE)  
-#define CACHEABLE 0  
-#define UNCACHEABLE 1  
+#define BCACHE (ICACHE|DCACHE)
+#define CACHEABLE 0
+#define UNCACHEABLE 1
 #endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */