Revert #38 (Move symlinks back into libblas)

[isuruf]

cc @minrk, @SylvainCorlay

Adds a blas-devel package as suggested by @minrk and restoring symlinks in libblas for now.

[conda-forge-linter]

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:

• It looks like the 'blas-devel' output doesn't have any tests.

[minrk]

Awesome, thanks! One question: there appears to be no netlib blas-devel, which means:

conda create -n blas blas-devel libblas=*=netlib

fails. This means that any package with a runtime dependency on blas-devel (e.g. fenics or petsc) will result in downstream packages either failing to install, or building with openblas.

I assume the correct fix is to either add netlib outputs for blas and blas-devel, either to this repo (probably best, to keep things in sync), or update lapack-feedstock to generate blas-devel.

[isuruf]

@minrk, can you send a PR to lapack-feedstock?

[isuruf]

@minrk ping.

[minrk]

opened: conda-forge/lapack-feedstock#30