Fix Android test_runner issue with symbolic lynks for output directories.
Fix Android test_runner issue with symbolic lynks for output directories.

As I compile for both Android and Linux from my checkout my "out" directory
is a symbolic lynk to either out_android or out_linux depending on what
I'm working with. This change fixes a key mismatching issue where the
key stored in the dictionary would still keep symbolic links while in
most other places they are resolved using os.path.realpath.

BUG=

Review URL: https://codereview.chromium.org/1513223005

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#364772}

catapult-project/catapult,SummerLW/Perf-Insight-Report,sahiljain/catapult,sahiljain/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,catapult-project/catapult,catapult-project/catapult-csm,benschmaus/catapult,sahiljain/catapult,SummerLW/Perf-Insight-Report,benschmaus/catapult,sahiljain/catapult,SummerLW/Perf-Insight-Report,benschmaus/catapult,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult,benschmaus/catapult,catapult-project/catapult,catapult-project/catapult,SummerLW/Perf-Insight-Report,sahiljain/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,benschmaus/catapult,sahiljain/catapult,SummerLW/Perf-Insight-Report,SummerLW/Perf-Insight-Report,catapult-project/catapult,catapult-project/catapult-csm,benschmaus/catapult,benschmaus/catapult