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/common/linux/auxvec.h b/libc/kernel/common/linux/auxvec.h
index 8002275..80d1022 100644
--- a/libc/kernel/common/linux/auxvec.h
+++ b/libc/kernel/common/linux/auxvec.h
@@ -19,6 +19,6 @@
 #ifndef _LINUX_AUXVEC_H
 #define _LINUX_AUXVEC_H
 #include <uapi/linux/auxvec.h>
-#define AT_VECTOR_SIZE_BASE 19  
+#define AT_VECTOR_SIZE_BASE 19
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif