Recognise alternate path to XML documentation for older versions of xbuild.
Recognise alternate path to XML documentation for older versions of xbuild.

polyethene/IronAHK,polyethene/IronAHK,polyethene/IronAHK,michaltakac/IronAHK,michaltakac/IronAHK,michaltakac/IronAHK,yatsek/IronAHK,yatsek/IronAHK,michaltakac/IronAHK,yatsek/IronAHK,polyethene/IronAHK,yatsek/IronAHK,michaltakac/IronAHK,yatsek/IronAHK