Add SELinux Policy for RILD to access FSG partition

QCRIL has to access FSG partition which contains the MCFG MBN files
for downloading to modem.

Bug: 18487207

Change-Id: I628653a9f1593151efe5db39832cadf7d77a5475
diff --git a/sepolicy/rild.te b/sepolicy/rild.te
index f65963f..d5482c6 100644
--- a/sepolicy/rild.te
+++ b/sepolicy/rild.te
@@ -25,3 +25,8 @@
   allow rild diag_logs:dir rw_dir_perms;
   allow rild diag_logs:file create_file_perms;
 ')
+
+# Allow permissions for FSG
+allow rild fsg_file:dir search;
+allow rild fsg_file:file r_file_perms;
+