dlx: utilize recovery_root_private

Prebuilt modules can be placed in the correct directory structure under
recovery/root and the build system will automatically copy them to the
recovery ramdisk.

Change-Id: Icc99d1dcd5b952c7f0356bd7cb3386f727bf62a8

Conflicts:

	full_dlx.mk
	recovery/root/init.recovery.dlx.rc
	rootdir/etc/init.recovery.dlx.rc
	rootdir/etc/init.recovery.dlxj.rc