Focused responsibility of supported tests in master.cfg instead of being in utils.py (hard to overview and maintain).
Enabled the following empty tests on all platforms:
- audio_conference_mixer_unittests
- cng_unittests
- g711_unittests
- g722_unittests
- pcm16b_unittests
- media_file_unittests
- udp_transport_unittests
- webrtc_utility_unittests
Removed "headless tests" concept since everything is now compiled in the make all step (no need for compile only, no execution tests).
Removed audio_device_test_func test since not a proper test (dev tool) that was configured as headless.
BUG=
TEST=Ran local master and successfully built and executed all tests with Mac build slave.
Review URL: http://webrtc-codereview.appspot.com/384002
git-svn-id: http://webrtc.googlecode.com/svn/trunk@1603 4adac7df-926f-26a2-2b94-8c16560cd09d
