Fixed recent breakage of conformance test runner.
Merge pull request #130 from kenrussell/harness

Fixed recent breakage of conformance test runner.
Specify --ignore-gpu-blacklist for Chrome in conformance test runner because some driver bugs are worked around using blacklist entries (i.e., multisampled renderbuffer corruption).
Merge pull request #131 from kenrussell/blacklist

Specify --ignore-gpu-blacklist for Chrome in conformance test runner bec...