Add a few flag tests to MythSystem.
Add MythSystem unit test for kMSAnonLog
Have make test in basedir rebuild test code if necessary.
Have make in basedir run unit tests on all target.

Note: An all_no_test target has been added to bypass unit tests when iterating on code.
Skip a currently malfunctioning mythsystem unit test.
Add more FIXME comments to mythsystem.h
Add unit test for kMSAbortOnJump flag
General improvements to mythsystem unit tests.
Add explicit GetStatus() test
Optionally run mythsystem tests that check logging output.