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/sockios.h b/libc/kernel/arch-mips/asm/sockios.h
index 0e5a4ac..c3b3334 100644
--- a/libc/kernel/arch-mips/asm/sockios.h
+++ b/libc/kernel/arch-mips/asm/sockios.h
@@ -26,6 +26,6 @@
 #define SIOCSPGRP _IOW('s', 8, pid_t)
 #define SIOCGPGRP _IOR('s', 9, pid_t)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define SIOCGSTAMP 0x8906  
-#define SIOCGSTAMPNS 0x8907  
+#define SIOCGSTAMP 0x8906
+#define SIOCGSTAMPNS 0x8907
 #endif