desktop-file-install related build failures

[Lennert Buytenhek <buytenh wantstofly org>]

I'm seeing a lot of build failures (on ARM) with messages like:

	/var/tmp/quarry-0.2.0-1.fc8-root-root/usr/share/applications/fedora-quarry.desktop: error: value "0.2.0" for key "Version" in group "Desktop Entry" is not a known version

On IRC I was told that this is due to stricter checks in a newer
version of desktop-file-utils.  I've disabled the validation in my
local copy of desktop-file-utils for now, as this issue is causing
important packages like qt to fail to build entirely.