migrated to fedora 43 from rawhide to fix build issues

toolboxes/Dockerfile.vulkan-radv

@@ -1,5 +1,7 @@
 # build stage
-FROM registry.fedoraproject.org/fedora:rawhide AS builder
+FROM registry.fedoraproject.org/fedora:43 AS builder
+# Toggle llama.cpp PR 15405 (RPC perf for large models)
+ARG APPLY_LLAMA_PR_15405=1
 
 # deps
 RUN dnf -y --nodocs --setopt=install_weak_deps=False install \
@@ -15,6 +17,12 @@ RUN git clone --recursive https://github.com/ggerganov/llama.cpp.git .
 
 # build
 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 \
  && cmake -S . -B build -G Ninja \
       -DGGML_VULKAN=ON \
@@ -37,7 +45,7 @@ RUN chmod +x /usr/local/bin/gguf-vram-estimator.py
 
 
 # runtime stage
-FROM registry.fedoraproject.org/fedora-minimal:rawhide
+FROM registry.fedoraproject.org/fedora-minimal:43
 
 # runtime deps
 RUN microdnf -y --nodocs --setopt=install_weak_deps=0 install \