Remove the line that deletes *.rc from the recovery ramdisk.
This is no longer necessary since recovery init.rc only includes "import /init.recovery.${ro.hardware}.rc".

Fix up the unpackbootimg target.

Change-Id: I30b515bda982fbd944fffbc64501588cd3702dd8
build: Add board platforms to qcom_utils

Change-Id: I85458167bf2b9c04b029d09b87bf791ff4cfd04d
merge origin/jb-4.2 into jb-4.2 branch