Build fails with mtmd feature enabled

[tobybraje]

When attempting to use the multimodal bindings to run vision models, the build fails.

With Cargo.toml as below:

llama-cpp-2 = { version = "0.1.121", features = ["mtmd"] }

cargo build fails with the following stderr output

 --- stderr
  fatal: not a git repository (or any of the parent directories): .git
  fatal: not a git repository (or any of the parent directories): .git
  CMake Warning at common/CMakeLists.txt:32 (message):
    Git repository not found; to enable automatic generation of build info,
    make sure Git is installed and the project is a Git repository.


  CMake Error at CMakeLists.txt:206 (add_subdirectory):
  The source directory

   /home/tobias/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/llama-cpp-sys-2-0.1.121/llama.cpp/tools

   does not contain a CMakeLists.txt file.



  thread 'main' panicked at /home/tobias/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/cmake-0.1.54/src/lib.rs:1119:5:

  command did not execute successfully, got: exit status: 1

  build script failed, must exit now

Git is installed, and the build succeeds as expected without the "mtmd" feature flag

[babichjacob]

Intended to be fixed by #806 or #810 but both have gone cold since (sorry).