Add pipeline upload script

.buildkite/pipeline-upload.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+#
+# This script is used to upload the full buildkite pipeline. The steps defined
+# in the buildkite UI should simply be:
+#
+#   steps:
+#    - command: "ci/buildkite-pipeline-upload.sh"
+#
+
+set -e
+cd "$(dirname "$0")"/..
+
+buildkite-agent pipeline upload ci/buildkite.yml
+
+if [[ $BUILDKITE_BRANCH =~ ^pull ]]; then
+  # Add helpful link back to the corresponding Github Pull Request
+  buildkite-agent annotate --style "info" \
+    "Github Pull Request: https://github.com/solana-labs/solana/$BUILDKITE_BRANCH"
+fi
+