fix unknown warning level for gcc
fix unknown warning level for gcc

waruqi/xmake,waruqi/xmake,tboox/xmake,waruqi/xmake,waruqi/xmake,tboox/xmake,tboox/xmake,tboox/xmake,tboox/xmake,waruqi/xmake,tboox/xmake,waruqi/xmake,waruqi/xmake,tboox/xmake