Fix pkgconfig

[beenje]

Checklist

• [X] Used a personal fork of the feedstock to propose changes
• [X] Bumped the build number (if the version is unchanged)
• [x] Re-rendered with the latest conda-smithy (Use the phrase code>@<space/conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• [X] Ensured the license file is being packaged.

Move lib/pkgconfig to omniorb-libs. Without those files, pkg-config can't find the libraries when installing only omniorb-libs.

This should avoid having to install omniorb as build/host requirement.

I also noticed a lot of extra files included in omniorb when testing the build locally. The output was relying on conda-build to filter on new files but that's not supposed to work when specifying multiple outputs. Not sure why it worked until now. I listed explicitly all files to include (using some regex on files - can't be used on directories). I compared the list of files with previous packages.

[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.

[beenje]

@conda-forge-admin, please rerender