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/mtd/nftl.h b/libc/kernel/common/linux/mtd/nftl.h
index 75cdf54..6fc423e 100644
--- a/libc/kernel/common/linux/mtd/nftl.h
+++ b/libc/kernel/common/linux/mtd/nftl.h
@@ -22,11 +22,11 @@
 #include <linux/mtd/blktrans.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <mtd/nftl-user.h>
-#define BLOCK_NIL 0xffff  
-#define BLOCK_FREE 0xfffe  
-#define BLOCK_NOTEXPLORED 0xfffd  
+#define BLOCK_NIL 0xffff
+#define BLOCK_FREE 0xfffe
+#define BLOCK_NOTEXPLORED 0xfffd
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define BLOCK_RESERVED 0xfffc  
+#define BLOCK_RESERVED 0xfffc
 struct NFTLrecord {
  struct mtd_blktrans_dev mbd;
  __u16 MediaUnit, SpareMediaUnit;