clover: Expose cl_khr_extended_versioning

With the extension specification merged in and the last query now
supported, the extension can be advertised.

v2: Fix indentation (Dave Airlie)

Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Pierre Moreau <dev@pmoreau.org>
Part-of: <!2078>
36 jobs for !2078 with clover_support_il_programs in 4 minutes and 33 seconds (queued for 3 seconds)
merge request