feat: Update llama.cpp to ggml-org/llama.cpp@3bd9aa1f9 (#2176)

* feat: Update llama.cpp to ggml-org/llama.cpp@3bd9aa1f9

* docs: Update changelog for llama.cpp bump

Author: abetlen

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- feat: Update llama.cpp to ggerganov/llama.cpp@3bd9aa1f9 and sync Python bindings
+
 ## [0.3.20]
 
 - refactor: Replace deprecated llama.cpp references in library, docs, and examples by @abetlen in #2170

llama_cpp/llama_cpp.py

@@ -88,7 +88,8 @@ def _warn_deprecated(symbol: str, hint: str) -> None:
 #     GGML_TYPE_IQ1_M   = 29,
 #     GGML_TYPE_MXFP4   = 39,
 #     GGML_TYPE_NVFP4   = 40,
-#     GGML_TYPE_COUNT,
+#     GGML_TYPE_Q1_0    = 41,
+#     GGML_TYPE_COUNT   = 42,
 # };
 GGML_TYPE_F32 = 0
 GGML_TYPE_F16 = 1
@@ -120,7 +121,8 @@ def _warn_deprecated(symbol: str, hint: str) -> None:
 GGML_TYPE_IQ1_M = 29
 GGML_TYPE_MXFP4 = 39
 GGML_TYPE_NVFP4 = 40
-GGML_TYPE_COUNT = 41
+GGML_TYPE_Q1_0 = 41
+GGML_TYPE_COUNT = 42
 
 # from ggml-backend.h
 # typedef bool (*ggml_backend_sched_eval_callback)(struct ggml_tensor * t, bool ask, void * user_data);
@@ -406,6 +408,7 @@ def _warn_deprecated(symbol: str, hint: str) -> None:
 #     LLAMA_FTYPE_MOSTLY_TQ2_0         = 37, // except 1d tensors
 #     LLAMA_FTYPE_MOSTLY_MXFP4_MOE     = 38, // except 1d tensors
 #     LLAMA_FTYPE_MOSTLY_NVFP4         = 39, // except 1d tensors
+#     LLAMA_FTYPE_MOSTLY_Q1_0          = 40, // except 1d tensors
 #
 #     LLAMA_FTYPE_GUESSED = 1024, // not specified in the model file
 # };
@@ -446,6 +449,7 @@ def _warn_deprecated(symbol: str, hint: str) -> None:
 LLAMA_FTYPE_MOSTLY_TQ2_0 = 37
 LLAMA_FTYPE_MOSTLY_MXFP4_MOE = 38
 LLAMA_FTYPE_MOSTLY_NVFP4 = 39
+LLAMA_FTYPE_MOSTLY_Q1_0 = 40
 LLAMA_FTYPE_GUESSED = 1024
 
 # enum llama_rope_scaling_type {