package/kmscube: Change repository to gitlab

The https://cgit.freedesktop.org/mesa/kmscube repository
is mirrored from https://gitlab.freedesktop.org/mesa/kmscube, so
switch to the gitlab one.

The other advantage of using the gitlab repository is that it can handle
archive downloads, so switch to it.

Suggested-by: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 396191b1562072de11a702ffb9d61e7de9f40c04)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/kmscube/kmscube.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 KMSCUBE_VERSION = 6cbd03ab94066dddbba7bedfde87c7c4319c18d5
-KMSCUBE_SITE = https://cgit.freedesktop.org/mesa/kmscube/snapshot
+KMSCUBE_SITE = https://gitlab.freedesktop.org/mesa/kmscube/-/archive/$(KMSCUBE_VERSION)
 KMSCUBE_LICENSE = MIT
 KMSCUBE_DEPENDENCIES = host-pkgconf mesa3d libdrm
 KMSCUBE_AUTORECONF = YES