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/pkt_sched.h b/libc/kernel/common/linux/pkt_sched.h
index edf5fe5..33c4db6 100644
--- a/libc/kernel/common/linux/pkt_sched.h
+++ b/libc/kernel/common/linux/pkt_sched.h
@@ -229,7 +229,7 @@
 };
 #define TC_HTB_NUMPRIO 8
 #define TC_HTB_MAXDEPTH 8
-#define TC_HTB_PROTOVER 3  
+#define TC_HTB_PROTOVER 3
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct tc_htb_opt
 {