llama.cpp b9950 release adds unit tests and fixes win32 builds

The llama.cpp project has released version b9950, which includes code quality improvements such as adding a unit test for llama-batch and fixing Windows 32-bit build issues.

• Added unit test for llama-batch functionality.
• Fixed win32 builds.
• Added not implemented assertions in unused methods.
• Removed unreachable code.

This release provides updated binaries for macOS, Linux, Android, Windows, and openEuler across various hardware backends including CPU, CUDA, Vulkan, ROCm, OpenVINO, SYCL, and HIP.