Comment 6 for bug 1722147

That moves it further, but it's still trying to find other drm related headers
mir: [ 3%] Linking CXX static library libkms_utils.a
mir: [ 3%] Built target kms_utils
mir: /srcbuild/mir/src/platforms/mesa/server/kms/display_buffer.cpp:35:28: fatal error: drm/drm_fourcc.h: No such file or directory
mir: #include <drm/drm_fourcc.h>
mir: ^
mir: compilation terminated.