Move rild to the core class.

Changes in init.stingray.rc now prevent rild from making sockets
or named pipes on /data.  Now that rild no longer prevents /data
from being unmounted, we can put it in the core class, which doesn't
restart when we enable encryption.  This speeds up the boot by 20+
seconds.

Change-Id: I71c426dab1b725e401116234167d41c7ccd958c1

rootdir/init.rc

@@ -357,7 +357,7 @@ service debuggerd /system/bin/debuggerd
     class main
 
 service ril-daemon /system/bin/rild
-    class main
+    class core
     socket rild stream 660 root radio
     socket rild-debug stream 660 radio system
     user root