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/ipv6.h b/libc/kernel/common/linux/ipv6.h
index 80d8c80..1e5f618 100644
--- a/libc/kernel/common/linux/ipv6.h
+++ b/libc/kernel/common/linux/ipv6.h
@@ -39,10 +39,10 @@
  __u32 ifr6_prefixlen;
  int ifr6_ifindex;
 };
-#define IPV6_SRCRT_STRICT 0x01  
+#define IPV6_SRCRT_STRICT 0x01
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define IPV6_SRCRT_TYPE_0 0  
-#define IPV6_SRCRT_TYPE_2 2  
+#define IPV6_SRCRT_TYPE_0 0
+#define IPV6_SRCRT_TYPE_2 2
 struct ipv6_rt_hdr {
  __u8 nexthdr;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */