Fix issue with Android.run-test.mk

We were clearing 2 makefile variables that was needed for our
buildbots to run correctly.

Test: m clean && ./test.py --target -j8
Test: m clean && ./test.py --host -j40
Change-Id: Ic15ccf6701bf12b7ee5aeddf940e0c343677c8b0
1 file changed