ENH put all run exports in activation scripts

[beckermr]

Checklist

• [ ] Used a fork of the feedstock to propose changes
• [ ] Bumped the build number (if the version is unchanged)
• [ ] Reset the build number to 0 (if the version changed)
• [ ] 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)
• [ ] Ensured the license file is being packaged.

[conda-forge-linter]

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

I wanted to let you know that I linted all conda-recipes in your PR (recipe) and found some lint.

Here's what I've got...

For recipe:

• The home item is expected in the about section.
• The license item is expected in the about section.
• The summary item is expected in the about section.
• The outputs section contained an unexpected subsection name. target is not a valid subsection name.
• The outputs section contained an unexpected subsection name. target is not a valid subsection name.
• The outputs section contained an unexpected subsection name. target is not a valid subsection name.
• The outputs section contained an unexpected subsection name. target is not a valid subsection name.

[beckermr]

@conda-forge-admin update team

[beckermr]

It looks like libgcc-ng did not get a run time dep on openmp_mutex like I thought the run exports here would have done.

TEST START: /home/conda/feedstock_root/build_artifacts/linux-ppc64le/libgcc-ng-8.2.0-hdd5993f_4.tar.bz2
Collecting package metadata (repodata.json): ...working... done
Solving environment: ...working... done

## Package Plan ##

  environment location: /home/conda/feedstock_root/build_artifacts/ctng-compilers_1578554478214/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_p

The following NEW packages will be INSTALLED:

    _libgcc_mutex: 0.1-conda_forge  conda-forge
    libgcc-ng:     8.2.0-hdd5993f_4 local      

Preparing transaction: ...working... done
Verifying transaction: ...working... done
Executing transaction: ...working... done
export PREFIX=/home/conda/feedstock_root/build_artifacts/ctng-compilers_1578554478214/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_p
export SRC_DIR=/home/conda/feedstock_root/build_artifacts/ctng-compilers_1578554478214/test_tmp
+ test -f /home/conda/feedstock_root/build_artifacts/ctng-compilers_1578554478214/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_p/lib/libgcc_s.so
+ test -f /home/conda/feedstock_root/build_artifacts/ctng-compilers_1578554478214/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_p/lib/libgomp.so
Tests failed for libgcc-ng-8.2.0-hdd5993f_4.tar.bz2 - moving package to /home/conda/feedstock_root/build_artifacts/broken
WARNING:conda_build.build:Tests failed for libgcc-ng-8.2.0-hdd5993f_4.tar.bz2 - moving package to /home/conda/feedstock_root/build_artifacts/broken
WARNING conda_build.build:tests_failed(2231): Tests failed for libgcc-ng-8.2.0-hdd5993f_4.tar.bz2 - moving package to /home/conda/feedstock_root/build_artifacts/broken
TESTS FAILED: libgcc-ng-8.2.0-hdd5993f_4.tar.bz2