GGUF data section alignment corrected in llama.cpp

The official source reports this update: b11019: gguf : align the data section relative to the GGUF start, not the file. gguf : align the data section relative to the GGUF start, not the file ( #28993 ) gguf : align the data section relative to the GGUF start, not the file gguf_init_from_file_ptr reads a GGUF from the current file position, but padded the data section from file offset 0, so a GGUF embedded at an offset that is not a multiple of the alignment loaded without error and returned wrong tensor data. Also adds llama_adapter_lora_init_from_file_ptr, and disables mmap with a warning when an embedded data section is not aligned, instead of asserting in ggml.