[llvm] updated buildkite pipeline generation (PR #65574)

[Mikhail Goncharov via llvm-commits]

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@@ -45,4 +51,4 @@ cmake -S ${MONOREPO_ROOT}/llvm -B ${BUILD_DIR} \
       -D CMAKE_CXX_COMPILER_LAUNCHER=sccache
 
 echo "--- ninja"
-ninja -C ${BUILD_DIR} ${targets}
+ninja -C "${BUILD_DIR}" "${targets}"
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metaflow wrote:

on it

https://github.com/llvm/llvm-project/pull/65574