init: Create new 'vpn' user/group and set owner of '/dev/tun' to it.

Signed-off-by: San Mehat <san@google.com>
diff --git a/init/devices.c b/init/devices.c
index b914c53..c278607 100644
--- a/init/devices.c
+++ b/init/devices.c
@@ -131,6 +131,7 @@
     { "/dev/qmi0",          0640,   AID_RADIO,      AID_RADIO,      0 },
     { "/dev/qmi1",          0640,   AID_RADIO,      AID_RADIO,      0 },
     { "/dev/qmi2",          0640,   AID_RADIO,      AID_RADIO,      0 },
+    { "/dev/tun",           0640,   AID_VPN  ,      AID_VPN,        0 },
     { NULL, 0, 0, 0, 0 },
 };