[render-test] Fix logging

Was broken after logging got moved to its own thread.

render-test/render_test.cpp

@@ -127,6 +127,8 @@ int runRenderTests(int argc, char** argv, std::function<void()> testStatus) {
     uint32_t seed;
     std::string manifestPath;
     std::string testFilter;
+
+    Log::useLogThread(false);
     TestRunner::UpdateResults updateResults;
 
     std::tie(recycleMap, shuffle, online, seed, manifestPath, updateResults, testFilter) = parseArguments(argc, argv);