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/genetlink.h b/libc/kernel/common/linux/genetlink.h
index 10b6504..f86ce05 100644
--- a/libc/kernel/common/linux/genetlink.h
+++ b/libc/kernel/common/linux/genetlink.h
@@ -21,7 +21,7 @@
 #include <linux/types.h>
 #include <linux/netlink.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define GENL_NAMSIZ 16  
+#define GENL_NAMSIZ 16
 #define GENL_MIN_ID NLMSG_MIN_TYPE
 #define GENL_MAX_ID 1023
 struct genlmsghdr {