Add the ability to write to the /dev/socket/qmux_radio for rild.

Change-Id: I0ebdc3df286e045e2ba31ae3f4f77ea78b06c7a2
diff --git a/sepolicy/rild.te b/sepolicy/rild.te
index 25bf5ad..208c6fa 100644
--- a/sepolicy/rild.te
+++ b/sepolicy/rild.te
@@ -1,2 +1,3 @@
 allow rild diag_device:chr_file rw_file_perms;
 allow rild qmux_socket:sock_file rw_file_perms;
+allow rild qmux_socket:dir rw_dir_perms;