Fix macos install name

[chrisburr]

Checklist

• [ ] Used a personal 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.

Fixes the error in https://github.com/conda-forge/rpm-tools-feedstock/pull/5:

+ rpm --help
dyld: Library not loaded: @LUA_PREFIX@/lib/liblua.5.4.dylib
  Referenced from: /Users/runner/miniforge3/conda-bld/rpm-tools_1602322933640/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac/lib/librpm.9.dylib
  Reason: image not found

[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.

[chrisburr]

@conda-forge/lua Ready for merging!

[chrisburr]

@conda-forge/lua Can this be merged?