Change M4AGO tag to dev-1.0.1

[TomasTorsvik]

Update release-1.6 branch with latest M4AGo tag.

[jmaerz]

Perfectly fine for me. I hope it resolves NorESMhub/NorESM#556 (comment) , while I am not sure about the wished cime default behavior.

[TomasTorsvik]

Thanks, it solves the problem for now.

It looks like there is a general issue with referencing tags in submodules that requires an additional git checkout <tag> if it's not the last commit on a branch (see e.g. https://www.geeksforgeeks.org/how-to-specify-a-branchtag-when-adding-a-git-submodule/). Don't know how this is handled internally in manage_externals.

I need to make a similar PR to the master branch as well.

[jmaerz]

i @TomasTorsvik , the current BLOM version in NorESM2.3 devel points to the dev-1.0.1 version, which is why the checkout resulted in a conflict (which is why I only updated to that version) - technically, there is a more recent commit that added some more README info.