Revert "bump submodule to `6c00a06` (#2479)"

This reverts commit 2f9ed52bbda3d2976c6ab704e1dc68c32be03500.

llm/llama.cpp

@@ -1 +1 @@
-Subproject commit 6c00a066928b0475b865a2e3e709e2166e02d548
+Subproject commit 099afc6274c859ca67146e725839f2d97a5ef313