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/can/gw.h b/libc/kernel/common/linux/can/gw.h
index 2aacd2d..8e9a8a7 100644
--- a/libc/kernel/common/linux/can/gw.h
+++ b/libc/kernel/common/linux/can/gw.h
@@ -57,12 +57,12 @@
 #define CGW_FLAGS_CAN_ECHO 0x01
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CGW_FLAGS_CAN_SRC_TSTAMP 0x02
-#define CGW_MOD_FUNCS 4  
+#define CGW_MOD_FUNCS 4
 #define CGW_MOD_ID 0x01
 #define CGW_MOD_DLC 0x02
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CGW_MOD_DATA 0x04
-#define CGW_FRAME_MODS 3  
+#define CGW_FRAME_MODS 3
 #define MAX_MODFUNCTIONS (CGW_MOD_FUNCS * CGW_FRAME_MODS)
 struct cgw_frame_mod {
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */