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/linkage.h b/libc/kernel/common/linux/linkage.h
index 5f3a027..b2f4b8b 100644
--- a/libc/kernel/common/linux/linkage.h
+++ b/libc/kernel/common/linux/linkage.h
@@ -56,7 +56,7 @@
 #endif
 #endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define NORET_TYPE  
+#define NORET_TYPE
 #define ATTRIB_NORET __attribute__((noreturn))
 #define NORET_AND noreturn,
 #ifndef FASTCALL