[Mingw-cross-env-list] new package: dbus

[Mark Brand]

Hi,

Recently I learned that Windows support had been added to the main dbus 
project, so I took on the challenge of adding dbus and enabled dbus 
support in Qt in mingw-cross-env.

For me this is still very experimental, and it wasn't obvious how to get 
connections working, so I thought I should post what seems to work for 
me at this stage:

http://pastebin.com/1nLqpDrB

Please feel free to experiment. It's probably possible to add dbus 
support to other packages too.

regards,

Mark