meson: Don't install headers

Until we can at least check for a matching ABI, the only supported way
of building is having the headers from the source checkout.

Signed-off-by: Petri Latvala <petri.latvala@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1 file changed