message: Use relative urls for submodules
diff: [submodule "mkl-dnn"]
  path = mkl-dnn
  - url = git@gitlab.com:OpenImageDenoise/mkl-dnn.git
  + url = ../mkl-dnn.git
  [submodule "weights"]
  path = weights
  - url = git@gitlab.com:OpenImageDenoise/oidn-weights.git
  + url = ../oidn-weights.git
  