removed check for msc_ver >= 1800 for winrt option
removed check for msc_ver >= 1800 for winrt option

stammen/angleproject,MSOpenTech/angle-win8.0,MSOpenTech/angle-win8.0,stammen/angleproject,MSOpenTech/angle-win8.0,stammen/angleproject,MSOpenTech/angle-win8.0,stammen/angleproject