[ci] Fix ci/bazelisk.sh printing to stdout

Signed-off-by: James Wainwright <[email protected]>

ci/bazelisk.sh

@@ -11,7 +11,7 @@ if [[ -n "${PWD_OVERRIDE}" ]]; then
     cd "${PWD_OVERRIDE}" || exit
 fi
 
-echo "Running bazelisk in $(pwd)."
+echo "Running bazelisk in $(pwd)." >&2
 
 # An additional bazelrc must be synthesized to specify precisely how to use the
 # GCP bazel cache.
@@ -20,10 +20,10 @@ GCP_BAZELRC="$(mktemp /tmp/XXXXXX.bazelrc)"
 trap 'rm ${GCP_BAZELRC}' EXIT
 
 if [[ -n "$GCP_CREDS_FILE" && -f "$GCP_CREDS_FILE" ]]; then
-    echo "Applying GCP cache key; will upload to the cache."
+    echo "Applying GCP cache key; will upload to the cache." >&2
     echo "build --google_credentials=${GCP_CREDS_FILE}" >> "${GCP_BAZELRC}"
 else
-    echo "No key/invalid path to key. Download from cache only."
+    echo "No key/invalid path to key. Download from cache only." >&2
     echo "build --remote_upload_local_results=false" >> "${GCP_BAZELRC}"
 fi