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/zconf.h b/libc/kernel/common/linux/zconf.h
index 8534969..86e5a4a 100644
--- a/libc/kernel/common/linux/zconf.h
+++ b/libc/kernel/common/linux/zconf.h
@@ -23,7 +23,7 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
 #ifndef MAX_WBITS
-#define MAX_WBITS 15  
+#define MAX_WBITS 15
 #endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifndef DEF_WBITS