[Github] Build stage2-clang-bolt target for CI container

Only the stage2-distribution target is built by default for the
stage2 distribution installation target. This means that we don't get a
BOLT optimized binary. This patch explicitly builds the
stage2-clang-bolt target before the distribution installation target so
that the clang binary is optimized before it gets installed.

Author: boomanaiden154

.github/workflows/containers/github-action-ci/Dockerfile

@@ -30,7 +30,7 @@ RUN cmake -B ./build -G Ninja ./llvm \
   -DLLVM_DISTRIBUTION_COMPONENTS="lld;compiler-rt;clang-format" \
   -DCLANG_DEFAULT_LINKER="lld"
 
-RUN ninja -C ./build stage2-install-distribution && ninja -C ./build install-distribution && rm -rf ./build
+RUN ninja -C ./build stage2-clang-bolt stage2-install-distribution && ninja -C ./build install-distribution && rm -rf ./build
 
 FROM base