dri: add kopper stubs to avoid build failures

Fixes: 62847d14b5 ("glx: delete DRI_KOPPER")

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30454>

src/gallium/frontends/dri/kopper_stubs.c

@@ -0,0 +1,35 @@
+/*  SPDX-License-Identifier: MIT */
+
+#include "dri_util.h"
+
+int64_t
+kopperSwapBuffers(__DRIdrawable *dPriv, uint32_t flush_flags)
+{
+   return 0;
+}
+
+int64_t
+kopperSwapBuffersWithDamage(__DRIdrawable *dPriv, uint32_t flush_flags, int nrects, const int *rects)
+{
+   return 0;
+}
+
+__DRIdrawable *
+kopperCreateNewDrawable(__DRIscreen *psp,
+                        const __DRIconfig *config,
+                        void *data,
+                        __DRIkopperDrawableInfo *info)
+{
+   return NULL;
+}
+
+void
+kopperSetSwapInterval(__DRIdrawable *dPriv, int interval)
+{
+}
+
+int
+kopperQueryBufferAge(__DRIdrawable *dPriv)
+{
+   return 0;
+}

src/gallium/frontends/dri/meson.build

@@ -40,6 +40,8 @@ if with_gallium_zink and not with_platform_android
   endif
   files_libdri += files('kopper.c')
   deps_for_libdri += vulkan_wsi_deps
+else
+  files_libdri += files('kopper_stubs.c')
 endif
 
 libdri = static_library(