Skip test_selectors.py when copying to stdlib.
Skip test_selectors.py when copying to stdlib.

manipopopo/asyncio,jashandeep-sohi/asyncio,fallen/asyncio,1st1/asyncio,haypo/trollius,vxgmichel/asyncio,gvanrossum/asyncio,Martiusweb/asyncio,haypo/trollius,haypo/trollius,fallen/asyncio,ajdavis/asyncio,ajdavis/asyncio,1st1/asyncio,gvanrossum/asyncio,jashandeep-sohi/asyncio,vxgmichel/asyncio,jashandeep-sohi/asyncio,Martiusweb/asyncio,ajdavis/asyncio,Martiusweb/asyncio,manipopopo/asyncio,fallen/asyncio,vxgmichel/asyncio,1st1/asyncio,gsb-eng/asyncio,manipopopo/asyncio,gsb-eng/asyncio,gvanrossum/asyncio,gsb-eng/asyncio