matchbox-desktop: fix compilation and installation

Libtool patch applies just fine.
mbdesktop_modules is installed by the matchbox-desktop and we
don't have to overwrite it with our copy(contains wrong paths).

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>