Re-enable two Linux tests

[cclauss]

Fixes #321

• 321

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    - if: runner.os == 'Linux'
      run: sudo apt-get install -y libmagic1

  sudo apt-get install -y libmagic1 Reading package lists... Building dependency tree... Reading state information... libmagic1 is already the newest version (1:5.41-3ubuntu0.1). libmagic1 set to manually installed. 0 upgraded, 0 newly installed, 0 to remove and 15 not upgraded.

@ddelange Your review, please.

[ddelange]

libmagic1 is already the newest version (1:5.41-3ubuntu0.1).

I think you'll need 5.44 or newer. At least with 5.45 it's passing: https://github.com/ddelange/python-magic/actions/runs/9189333058/job/25271162839#step:4:13

To install latest libmagic from source, I'm adding add_libmagic.sh in #294.

[cclauss]

Closing in favor of #294 which fixes these tests.

• 294