Add some missing reloc types

[themadbit]

Your checklist for this pull request

• [x] I've read the guidelines for contributing to this repository.
• [x] I made sure to follow the project's coding style.
• [ ] I've documented every RZ_API function and struct this PR changes.
• [ ] I've added tests that prove my changes are effective (required for changes to RZ_API).
• [ ] I've updated the Rizin book with the relevant information (if needed).

Detailed description

Added some missing R_386_ reloc types.

Test plan

I'm still figuring out how to write the test for the changes. Some guidance on the same would be appreciated.

Related to https://github.com/rizinorg/rizin/issues/4699

[notxvilka]

@themadbit see test/db/formats/elf/reloc as an example

[notxvilka]

Ping?