fixed compilation error in 2013 (does not support thread_local keyword)
fixed compilation error in 2013 (does not support thread_local keyword)

mihadyuk/spdlog,godbyk/spdlog,COMBINE-lab/spdlog,mihadyuk/spdlog,hunter-packages/spdlog,mihadyuk/spdlog,icylord/spdlog,hunter-packages/spdlog,godbyk/spdlog,icylord/spdlog,hunter-packages/spdlog,icylord/spdlog,COMBINE-lab/spdlog,godbyk/spdlog,COMBINE-lab/spdlog