targets/dri-ilo: make the driver installable

targets/dri-ilo: make the driver installable

install-gallium-links.mk fails to create the compat link for ilo_dri.so
because it looks for dri_LTLIBRARIES instead of noinst_LTLIBRARIES.  Fix this
by switching to dri_LTLIBRARIES (and make the driver installable).

Since pci_id_driver_map.h and the DDX both tell libGL.so to look for "i965",
ilo_dri.so will never be loaded even enabled and installed.  The change should
not create any more confusion.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>