selinux: Add a rule to label the extended keyhandler dex files

These should be treated as regular dex cache files, but they're
expanded outside of the normal cache dir

Change-Id: Id046e1b90116b35d2e7817ed4717fcef78135f08
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index dc770f2..7d7a2b4 100644
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts
@@ -19,3 +19,6 @@
 # Superuser's control sockets
 /dev/com.android.settings.daemon(/.*)?   u:object_r:superuser_device:s0
 /dev/com.android.settings(/.*)?   u:object_r:superuser_device:s0
+
+# Expansion of these hooks is a bit unconventional
+/cache/com.cyanogenmod.keyhandler.dex   u:object_r:dalvikcache_data_file:s0