[posix] do not exit upon recv getting EINTR (#4126)
[posix] do not exit upon recv getting EINTR (#4126)


lanyuwen/openthread,jwhui/openthread,openthread/openthread,librasungirl/openthread,openthread/openthread,chshu/openthread,bukepo/openthread,abtink/openthread,abtink/openthread,jwhui/openthread,jwhui/openthread,srickardti/openthread,librasungirl/openthread,lanyuwen/openthread,srickardti/openthread,bukepo/openthread,chshu/openthread,turon/openthread,bukepo/openthread,chshu/openthread,chshu/openthread,bukepo/openthread,srickardti/openthread,abtink/openthread,openthread/openthread,lanyuwen/openthread,lanyuwen/openthread,srickardti/openthread,lanyuwen/openthread,abtink/openthread,chshu/openthread,turon/openthread,librasungirl/openthread,librasungirl/openthread,openthread/openthread,jwhui/openthread,turon/openthread,turon/openthread,lanyuwen/openthread,chshu/openthread