Add MingW build to TravisCI
Add MingW build to TravisCI

Haivision/srt,ethouris/srt,Cinegy/srt,Haivision/srt,Cinegy/srt,ethouris/srt,ethouris/srt,Haivision/srt,Cinegy/srt,Haivision/srt,ethouris/srt,Cinegy/srt