[libc++] Fix incorrect shell expansion in macos-ci-setup

diff --git a/libcxx/utils/ci/macos-ci-setup b/libcxx/utils/ci/macos-ci-setup
index 5cb9d1e..f9bf488 100755 (executable)
--- a/libcxx/utils/ci/macos-ci-setup
+++ b/libcxx/utils/ci/macos-ci-setup
@@ -20,7 +20,7 @@ CFG_DIR="$(brew --prefix)/etc/buildkite-agent"
 version="$(sw_vers -productVersion | sed -E 's/([0-9]+).([0-9]+).[0-9]+/\1.\2/')"
 
 # Setup the tags of the agent
-echo 'tags="queue=libcxx-builders-macos,queue=libcxx-builders-macos${version}"' >> "${CFG_DIR}/buildkite-agent.cfg"
+echo "tags=\"queue=libcxx-builders-macos,queue=libcxx-builders-macos${version}\"" >> "${CFG_DIR}/buildkite-agent.cfg"
 
 # Setup the BuildKite Agent token
 sed -i '' "s/xxx/${BUILDKITE_AGENT_TOKEN}/g" "${CFG_DIR}/buildkite-agent.cfg"