meson: fix underlinkage without dri3

meson: fix underlinkage without dri3

There are some case where the dri3 loader is covering for underlinkage
for GLX and EGL, provide the linkage that they actually need.

v2: - remove dep_xcb_dri3 from glx. This was an oversight in v1 and is
      not needed.

Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
Reviewed-by: Jon Turney <jon.turney@dronecode.org.uk> (v1)
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com> (v1)
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>