Add package flags

info.yml

@@ -1,7 +1,7 @@
 name: mesa
 description: Open source implementations of OpenGL, OpenGL ES, Vulkan, OpenCL, and more
 version: 26.1.4
-revision: 1
+revision: 2
 url: https://www.mesa3d.org/
 license: MIT and BSD-3-Clause and SGI-B-2.0
 maintainers:
@@ -48,6 +48,12 @@ make_depends:
   - wayland-protocols
   - xcb-util-keysyms
   - xorgproto
+flags:
+  - name: video-codecs
+    default_value: all_free
+    accepted_values:
+      - value: all_free
+      - value: all
 provides:
   - opencl-driver
   - opengl-driver