llama.cpp: update to b5415

[oytech]

Description

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS 14.7.5 23H527 arm64
Command Line Tools 16.2.0.0.1.1733547573

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• referenced existing tickets on Trac with full URL in commit message?
• checked your Portfile with port lint?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vs install?
• tested basic functionality of all binary files? (llama-bench, llama-cli, llama-server, llama-simple, llama-simple-chat)
• checked that the Portfile's most important variants haven't been broken? (+blas+openmp)

[macportsbot]

Notifying maintainers:
@i0ntempest for port llama.cpp.

[i0ntempest]

I'll be updating with a new variant after I sort everything out

[oytech]

@i0ntempest current llama.cpp version (b4534) in port is 4 months old and llama.cpp is fast paced project adding stuff every week. In newer version you have for example multimodal support (ggml-org/llama.cpp#12898). Why not just update the version in the mean time?