Install gdbus.exe on Windows

gdbus.exe is needed to have interprocess communication to launch action.

issue11024
review366321002
(grafted from eba089cb041a2cd86836c883fec1408c6bc61135)

--HG--
branch : 6.0

make-win32-installer.sh

@@ -6,4 +6,5 @@ bits=`python -c "import platform; print(platform.architecture()[0])"`
 rm -rf build dist
 ./setup.py compile_catalog
 ./setup-freeze.py install_exe -d dist
+cp `which gdbus.exe` dist/
 makensis -DVERSION=${version} -DSERIES=${series} -DBITS=${bits} setup.nsi