Remove usage of AI_V4MAPPED
Remove usage of AI_V4MAPPED

This caused our tests to fail on FreeBSD and doesn't really add any
value.

Addresses https://github.com/facebook/libphenom/issues/49

rogerchina/libphenom,seem-sky/libphenom,sakishum/libphenom,yangjin-unique/libphenom,facebook/libphenom,seem-sky/libphenom,facebook/libphenom,facebook/libphenom,zhenglaizhang/libphenom,zhenglaizhang/libphenom,ChinaLongGanHu/libphenom,zhakui/libphenom,rogerchina/libphenom,rogerchina/libphenom,ChinaLongGanHu/libphenom,facebook/libphenom,sakishum/libphenom,mhaberler/libphenom,yangjin-unique/libphenom,mhaberler/libphenom,seem-sky/libphenom,dailypips/libphenom,zhakui/libphenom,mhaberler/libphenom,zhakui/libphenom,dailypips/libphenom,zhakui/libphenom,yangjin-unique/libphenom,yangjin-unique/libphenom,ChinaLongGanHu/libphenom,ChinaLongGanHu/libphenom,dailypips/libphenom,dailypips/libphenom,rogerchina/libphenom,zhenglaizhang/libphenom,facebook/libphenom,mhaberler/libphenom,dailypips/libphenom,seem-sky/libphenom,yangjin-unique/libphenom,sakishum/libphenom,zhakui/libphenom,zhenglaizhang/libphenom,rogerchina/libphenom,sakishum/libphenom,zhenglaizhang/libphenom,seem-sky/libphenom,mhaberler/libphenom,sakishum/libphenom,ChinaLongGanHu/libphenom