Build: Only define HAVE_DECL_PROGRAM_INVOCATION_NAME if it is set to 1.

Pull request checklist

Please check if your PR fulfills the following requirements:

[ ] Tests for the changes have been added (for bug fixes / features)
[ ] Docs have been reviewed and added / updated if needed (for bug fixes / features)
[X] Build was run locally and without warnings or errors
[X] All previous and new tests pass

Pull request type

Please check the type of change your PR introduces: - [X] Bugfix - [ ] Feature - [ ] Code style update (formatting, renaming, typo fix) - [ ] Refactoring (no functional changes, no api changes) - [X] Build related changes - [ ] Documentation content changes - [ ] Other (please describe): ## What is the current behavior?

HAVE_DECL_PROGRAM_INVOCATION_NAME macro definition is inconsistent across build systems and is always defined, even if set to 0.

Related Issue URL:

What is the new behavior?

HAVE_DECL_PROGRAM_INVOCATION_NAME -> HAVE_PROGRAM_INVOCATION_NAME
Consistent across all build systems
HAVE_PROGRAM_INVOCATION_NAME is only defined when set to 1

Does this introduce a breaking change?

[ ] Yes
[X No

tukaani-project / xz