mono/mono — pull request #1274 by akoeplinger (2014-09-10 23:10:37+00:00)
Title: [System] Added -d:TRACE to TEST_MCS_FLAGS

This is required for the tests added in PR #1267.
The TraceSource's TraceEvent method has a `Conditional ("TRACE")` attribute which means it is only invoked when that conditional is defined.