License headers: add missing license identifiers

source/blender/blenkernel/BKE_mesh.hh

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 #pragma once
 

source/blender/draw/engines/eevee_next/shaders/infos/eevee_irradiance_cache_info.hh

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
 #include "eevee_defines.hh"
 #include "gpu_shader_create_info.hh"
 

source/blender/gpu/tests/texture_test.cc

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
 #include "gpu_testing.hh"
 
 #include "MEM_guardedalloc.h"