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/netlink.h b/libc/kernel/common/linux/can/netlink.h
index a6006d3..df8a19c 100644
--- a/libc/kernel/common/linux/can/netlink.h
+++ b/libc/kernel/common/linux/can/netlink.h
@@ -71,12 +71,12 @@
  __u32 flags;
 };
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define CAN_CTRLMODE_LOOPBACK 0x01  
-#define CAN_CTRLMODE_LISTENONLY 0x02  
-#define CAN_CTRLMODE_3_SAMPLES 0x04  
-#define CAN_CTRLMODE_ONE_SHOT 0x08  
+#define CAN_CTRLMODE_LOOPBACK 0x01
+#define CAN_CTRLMODE_LISTENONLY 0x02
+#define CAN_CTRLMODE_3_SAMPLES 0x04
+#define CAN_CTRLMODE_ONE_SHOT 0x08
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define CAN_CTRLMODE_BERR_REPORTING 0x10  
+#define CAN_CTRLMODE_BERR_REPORTING 0x10
 struct can_device_stats {
  __u32 bus_error;
  __u32 error_warning;