Use logical(c_bool) for interop

[DJDavies2]

Description

Addresses ecmwf/atlas#333 in conjunction with ecmwf/atlas#334. Changes logical to logical(c_bool) where C interop is concerned.

Contributor Declaration

By opening this pull request, I affirm the following:

• All authors agree to the Contributor License Agreement.
• The code follows the project's coding standards.
• I have performed self-review and added comments where needed.
• I have added or updated tests to verify that my changes are effective and functional.
• I have run all existing tests and confirmed they pass.

[wdeconinck]

I can close this PR because an alternative fix for ecmwf/atlas#333 was made.