[macos] fix platform UDP on macOS (#3163)
[macos] fix platform UDP on macOS (#3163)


erja-gp/openthread,jwhui/openthread,openthread/openthread,openthread/openthread,jwhui/openthread,jwhui/openthread,lanyuwen/openthread,LeZhang2016/openthread,bukepo/openthread,abtink/openthread,bukepo/openthread,srickardti/openthread,abtink/openthread,librasungirl/openthread,openthread/openthread,bukepo/openthread,srickardti/openthread,chshu/openthread,librasungirl/openthread,gandreello/openthread,chshu/openthread,LeZhang2016/openthread,LeZhang2016/openthread,gandreello/openthread,turon/openthread,erja-gp/openthread,lanyuwen/openthread,lanyuwen/openthread,LeZhang2016/openthread,erja-gp/openthread,srickardti/openthread,abtink/openthread,gandreello/openthread,gandreello/openthread,turon/openthread,srickardti/openthread,abtink/openthread,chshu/openthread,turon/openthread,chshu/openthread,lanyuwen/openthread,erja-gp/openthread,gandreello/openthread,gandreello/openthread,librasungirl/openthread,chshu/openthread,erja-gp/openthread,erja-gp/openthread,lanyuwen/openthread,turon/openthread,openthread/openthread,chshu/openthread,LeZhang2016/openthread,jwhui/openthread,LeZhang2016/openthread,librasungirl/openthread,bukepo/openthread,lanyuwen/openthread