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/procinfo.h b/libc/kernel/arch-arm/asm/procinfo.h
index 7a665e7..e2ca039 100644
--- a/libc/kernel/arch-arm/asm/procinfo.h
+++ b/libc/kernel/arch-arm/asm/procinfo.h
@@ -48,7 +48,7 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define HWCAP_HALF 2
 #define HWCAP_THUMB 4
-#define HWCAP_26BIT 8  
+#define HWCAP_26BIT 8
 #define HWCAP_FAST_MULT 16
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define HWCAP_FPA 32