migrated to fedora 43 from rawhide to fix build issues

toolboxes/Dockerfile.rocm-6.4.4-rocwmma

@@ -1,5 +1,7 @@
 # build stage
 FROM registry.fedoraproject.org/fedora:43 AS builder
+# Toggle llama.cpp PR 15405 (RPC perf for large models)
+ARG APPLY_LLAMA_PR_15405=1
 
 # rocm 6.4.4 repo
 RUN <<'EOF'
@@ -42,6 +44,12 @@ WORKDIR /opt/llama.cpp
 RUN git clone --recursive https://github.com/ggerganov/llama.cpp.git .
 
 RUN git clean -xdf \
+ && if [ "${APPLY_LLAMA_PR_15405}" = "1" ]; then \
+      git config user.email "builder@localhost"; \
+      git config user.name "Container Builder"; \
+      git fetch origin pull/15405/head:pr-15405; \
+      git merge --no-edit pr-15405; \
+    fi \
  && git submodule update --recursive
 
 # overwrite upstream header with our local fixed version