add stdlib

[h-vetinari]

Test linter hint

[conda-forge-webservices[bot]]

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) and found it was in an excellent condition.

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

For recipe:

• This recipe is using a compiler, which now requires adding a build dependence on {{ stdlib("c") }} as well. For further details, please see https://github.com/conda-forge/conda-forge.github.io/issues/2102.

[xhochy]

Fixed in #263