add required dep for libmlir run-export

[h-vetinari]

We're using mlir here already, but that doesn't actually run-export anything. However, without libMLIR, conda-forge/flang-activation-feedstock#60 fails at runtime. The problems were already visible in the link-check on main, but not flagged, so add error_overlinking: true to catch these cases going forward.

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe/meta.yaml:

• ℹ️ The recipe is not parsable by parser conda-souschef (grayskull). This parser is not currently used by conda-forge, but may be in the future. We are collecting information to see which recipes are compatible with grayskull.
• ℹ️ The recipe is not parsable by parser conda-recipe-manager. The recipe can only be automatically migrated to the new v1 format if it is parseable by conda-recipe-manager.

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