bin/elf: load ARM Thumb function information correctly

[notxvilka]

Your checklist for this pull request

• I've read the guidelines for contributing to this repository.
• 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).
• I've used AI tools to generate fully or partially these code changes and I'm sure the changes are not copyrighted by somebody else.

Detailed description

Just recognize $t markings in ELF correctly

Requires rizinorg/rizin-testbins#295

Test plan

CI is green

Closing issues

Closes #4665