Add uthash

[tytan652]

Description

Add uthash to obs-deps.

Yes, they should be installed in the include directory without any subdirectory to align with Linux distros.

Motivation and Context

Reduce in-tree vendored deps in OBS Studio repo.

How Has This Been Tested?

CI builds artifacts on my fork PR, they contain headers and license files.

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[derrod]

Is there a specific reason to include the other headers? We only need uthash.h and there should be no interdependence between them.

[tytan652]

I just did it like a packager should do it since all the header are part of uthash.

[PatTheMav]

Should be good. I also agree with copying all related files to make it a "default" distribution.

The compiler will pull in files as needed.

[RytoEX]

Seems fine at a glance. Will merge when we get to a merge window.