Correctly create directories before unzipping dexpreopt zip

Ie7daa94e107d53eff075ca58dbe721bd9d7fc8c2 attempted to pre-create
the directories that unzip would unzip into, but incorrectly
created them in the top of the source tree instead of in
$(PRODUCT_OUT).  Fix the directory location and add a cleanspec
to clean up the incorrect directories in the source tree.

Bug: 119412419
Test: m correctly cleans up incorrect directories in source tree
Test: extract unzip command from out/verbose.log.gz and add bash -x
Change-Id: Ica006a007d112c232311435aaac0c0e476232b67