init: gs101: restorecon persist modem file

Bug: 215311024
Change-Id: I8292a5066c3658a8acde622014881338ea24379a
diff --git a/conf/init.gs101.rc b/conf/init.gs101.rc
index 4b41614..9cb1de3 100644
--- a/conf/init.gs101.rc
+++ b/conf/init.gs101.rc
@@ -525,6 +525,7 @@
     restorecon_recursive /mnt/vendor/persist/audio
     restorecon_recursive /mnt/vendor/persist/sensors
     restorecon_recursive /mnt/vendor/persist/battery
+    restorecon_recursive /mnt/vendor/persist/modem
     # Set up display-related directories and permissions
     # Add restorecon_recursive command to make sure the restorecon label is persist_display_file.
     restorecon_recursive /mnt/vendor/persist/display