VIACodec: Removed trace option from VIA loader. Mac Makefile builds symbols

Trace option features were no longer of signifiant value.
VireoMicro, Thread:  Fixed up #ifdefs for Thread.h/.cpp initial OSX project for micro

Source allows for conditionally removing all mutex references for simple single thread situations.
Some related XCode project cleanup.
Tests:  tests results have comment lines stripped out before comparison.

The run-tests.sh script now strips out comments using SED. This allows the test results to include
dynamic data such as timing information which will not be compared with expected results.