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/mtd.h b/libc/kernel/common/linux/mtd/mtd.h
index 90ffcfc..d2472cf 100644
--- a/libc/kernel/common/linux/mtd/mtd.h
+++ b/libc/kernel/common/linux/mtd/mtd.h
@@ -142,10 +142,10 @@
  struct list_head list;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-#define MTD_DEBUG_LEVEL0 (0)  
-#define MTD_DEBUG_LEVEL1 (1)  
-#define MTD_DEBUG_LEVEL2 (2)  
+#define MTD_DEBUG_LEVEL0 (0)
+#define MTD_DEBUG_LEVEL1 (1)
+#define MTD_DEBUG_LEVEL2 (2)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define MTD_DEBUG_LEVEL3 (3)  
+#define MTD_DEBUG_LEVEL3 (3)
 #define DEBUG(n, args...) do { } while(0)
 #endif