update VPN related kernel headers to 2.6.39.

The original files are updated in I84220a16b667082f4ff75e72c6b0f2f0dddb65df.

Change-Id: I14ca73b79c66427fd2ad58fb54a5ac649c9b7eee
diff --git a/libc/kernel/common/linux/if_pppopns.h b/libc/kernel/common/linux/if_pppopns.h
index ac75210..0eb7670 100644
--- a/libc/kernel/common/linux/if_pppopns.h
+++ b/libc/kernel/common/linux/if_pppopns.h
@@ -7,22 +7,27 @@
  ***   structures, and macros generated from the original header, and thus,
  ***   contains no copyrightable information.
  ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
  ****************************************************************************
  ****************************************************************************/
 #ifndef __LINUX_IF_PPPOPNS_H
 #define __LINUX_IF_PPPOPNS_H
-
 #include <linux/socket.h>
 #include <linux/types.h>
-
-#define PX_PROTO_OPNS 3
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct sockaddr_pppopns {
  sa_family_t sa_family;
  unsigned int sa_protocol;
  int tcp_socket;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u16 local;
  __u16 remote;
 } __attribute__((packed));
-
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */