COMP: Use temp dir for TestOggTheoraWriter

The test is failing on a few platforms. It trys to write in the
current directory. Tests should write files into the temp directory.
Perhaps this wil fix those tests.

Change-Id: I213fdbeeae444127086dfa9978d082208e3c12c1
Merge topic 'UseTempDirForOutput_Ogg' into master

27249f69 COMP: Use temp dir for TestOggTheoraWriter