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/tty.h b/libc/kernel/common/linux/tty.h
index c850203..5f5cdcb 100644
--- a/libc/kernel/common/linux/tty.h
+++ b/libc/kernel/common/linux/tty.h
@@ -18,6 +18,6 @@
  ****************************************************************************/
 #ifndef _LINUX_TTY_H
 #define _LINUX_TTY_H
-#define N_CAIF 20  
+#define N_CAIF 20
 #endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */