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/neighbour.h b/libc/kernel/common/linux/neighbour.h
index 90de583..a59e69c 100644
--- a/libc/kernel/common/linux/neighbour.h
+++ b/libc/kernel/common/linux/neighbour.h
@@ -47,7 +47,7 @@
 #define NDA_MAX (__NDA_MAX - 1)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NTF_USE 0x01
-#define NTF_PROXY 0x08  
+#define NTF_PROXY 0x08
 #define NTF_ROUTER 0x80
 #define NUD_INCOMPLETE 0x01
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */