Bug 1803765 - Include cubeb's test_logging.cpp in gtests. r=cubeb-reviewers,kinetik

Differential Revision: https://phabricator.services.mozilla.com/D163721

media/libcubeb/gtest/moz.build

@@ -21,6 +21,7 @@ if CONFIG['OS_TARGET'] != 'Android':
   UNIFIED_SOURCES += [
     '../test/test_audio.cpp',
     '../test/test_latency.cpp',
+    '../test/test_logging.cpp',
     '../test/test_sanity.cpp'
   ]