Add recoveryzip target. Import recovery building/porting tools.
recoveryzip: Fix build of recoveryzip

The recoveryzip target was failing due to the change in the
handling of OUT_DIR. This removes the script's attempts to
set the path itself and uses the common variables instead.

Change-Id: I2a1334e940881005b9d3445b387858edf6da264a
Fix double entries due to merge derp

Change-Id: I3c9f4b90ead6e027d5fe3a58903e9c638551a3c1