ART: Change Python code in run-test

We rely on Python's os.path.realpath as the "nuclear option" to
resolve the temp directory. However, between Python 2 and Python 3,
it is better not to use print.

Bug: 140161314
Test: art/test/testrunner/testrunner.py -b --host -t 001-HelloWorld
Change-Id: I38ad20d63b94e5bf816cb019f9f95cb2934e33dc
1 file changed