dri3: Enable DRI3 version 1.2

Enable DRI3 v1.2 now that all functions have been implemented and
that there is at least one backend implementing the driver hooks
(modesetting/glamor).

Signed-off-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Acked-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>

include/protocol-versions.h

@@ -48,7 +48,7 @@
 
 /* DRI3 */
 #define SERVER_DRI3_MAJOR_VERSION               1
-#define SERVER_DRI3_MINOR_VERSION               0
+#define SERVER_DRI3_MINOR_VERSION               2
 
 /* DMX */
 #define SERVER_DMX_MAJOR_VERSION		2