ueventd.rc: Give system process permission to enable and disable USB functions

Change-Id: I4af1f3fed857df2be96a640f65cd612577c957c7
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/rootdir/ueventd.rc b/rootdir/ueventd.rc
index 356de46..51a4337 100644
--- a/rootdir/ueventd.rc
+++ b/rootdir/ueventd.rc
@@ -79,4 +79,4 @@
 # sysfs properties
 /sys/devices/virtual/input/input*   enable      0660  root   input
 /sys/devices/virtual/input/input*   poll_delay  0660  root   input
-
+/sys/devices/virtual/usb_composite/*   enable      0664  root   system