Fix gdm autostart path
Fix gdm autostart path

gdm 3.1.90 (June 2011) changed the path where .desktop files which should
be autostarted with gdm needs to be located.
This used to be $(datadir)/gdm/autostart/LoginWindow and is now
$(datadir)/gdm/greeter/autostart.
This means that when running gdm in a VM in a recent distribution,
arbitrary resizing the VM window will not cause the resolution to be
adjusted. This used to be working in eg RHEL6.

This patch installs the .desktop file to both paths in order to work both
with older and newer gdms.

elmarco/vdagent-gtk,elmarco/vdagent-gtk,elmarco/vdagent-gtk