glx/dri3: set the implemented version of __DRIimageLoaderExtension

... over the one provided by the spec.
Currently both versions are identical, but that is not
guaranteed to be the case in the future.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
1 file changed