mesa3d: add dependency on host-xutil_makedepend

The mesa3d now requires the makedepend host utility, otherwise, it
fails with:

configure: error: makedepend is required to build Mesa

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reported-by: Noel Vellemans <Noel.Vellemans@visionBMS.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>