Code review comment for lp://qastaging/~alan-griffiths/mir/deduplicate-platform-plugin-symbols-maps

It *seems* to work. Although I agree we should be concerned about mentioning "mesa" in non-mesa platforms...

$ cat mesa/symbols.map
MIR_CLIENTPLATFORM_1 {
  global:
    create_client_platform_factory;
    # Needed by our Mesa EGL platform
    mir_client_mesa_egl_native_display_is_valid;
  local: *;
};