[build] Fixed missing ws2_32 lib in Windows installer (#2169)
[build] Fixed missing ws2_32 lib in Windows installer (#2169)

The property file libsrt.props did not reference ws2_32.lib. For large
applications which already reference the Windows socket library, there
is no difference. In small test applications which reference libsrt only,
there were undefined symbols.
Cinegy/srt,ethouris/srt,Haivision/srt,Haivision/srt,Cinegy/srt,ethouris/srt,Cinegy/srt,Haivision/srt,ethouris/srt,ethouris/srt,Cinegy/srt,Haivision/srt