message: ci: Fix mac python issue
diff: #!/bin/bash
  +set +x
  +
  echo "Setting up default XCode version"
  case "$SYSTEM_JOBNAME" in
  *xcode941*)
  @@ -32,6 +34,7 @@ brew install c-blosc
  echo "Installing python and friends"
  brew install python numpy
  brew link --overwrite python
  +brew link --overwrite numpy
  if [[ "$SYSTEM_JOBNAME" =~ .*openmpi.* ]]
  then
  