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

(cherry picked from commit 24bd3f9d63c81f448b7fe1854742fda0343a2297)

Change-Id: I9243b448f3601dec02615699a5bca7dd7472de53
1 file changed