RIL: change user of /dev/mdm to radio

RIL daemon will do ioctl to /dev/mdm, so we change the user permission.

Change-Id: Iecbaa78be986a0a5705d94f11f6ea937dcc302c3
Signed-off-by: terry.cr_huang <terry.cr_huang@htc.com>
diff --git a/ueventd.flounder.rc b/ueventd.flounder.rc
index f93083b..5692877 100644
--- a/ueventd.flounder.rc
+++ b/ueventd.flounder.rc
@@ -43,7 +43,7 @@
 /dev/adf*       0660    media   graphics
 /dev/tlk_device 0660    system  drmrpc
 #for mdm9x25
-/dev/mdm        0660    system  system
+/dev/mdm        0660    radio  system
 /dev/ks_hsic_bridge       0660   system     system
 /dev/efs_hsic_bridge      0660   system     system
 /dev/block/mmcblk0p8     0660   system     system