Clear odex/vdex/art file before running run-test

This allows individual tests to call the RUN script
multiple times.

Test: ./test/testrunner/testrunner.py [--host|--target] [--no-prebuild]
Bug: 38213479
Change-Id: Ibbac7404b44ea175a5aba0459dd7c7868c530954
1 file changed