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/efs_dir.h b/libc/kernel/common/linux/efs_dir.h
index 40991a3..98a5ba7 100644
--- a/libc/kernel/common/linux/efs_dir.h
+++ b/libc/kernel/common/linux/efs_dir.h
@@ -31,7 +31,7 @@
 #define EFS_MAXNAMELEN ((1 << (sizeof(char) * 8)) - 1)
 #define EFS_DIRBLK_HEADERSIZE 4
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define EFS_DIRBLK_MAGIC 0xbeef  
+#define EFS_DIRBLK_MAGIC 0xbeef
 struct efs_dir {
  __be16 magic;
  unsigned char firstused;