Fixed WNFibers build for VS2013/2015
Fixed WNFibers build for VS2013/2015

Change-Id: I454d4542ba8e213550049bc3bd44979f2b09c2ad
Reviewed-on: https://wn-project.dnsalias.net/gerrit/143
Reviewed-by: Devon Powell <bef84a74f4a3947934cc58306a6aae518eaf1936@gmail.com>
Tested-by: Devon Powell <bef84a74f4a3947934cc58306a6aae518eaf1936@gmail.com>
Try: Andrew Woloszyn <2926f0436f8103ab8257713335cf26447d8bf68a@google.com>

WNProject/WNFramework,WNProject/WNFramework,WNProject/WNFramework,WNProject/WNFramework