chore: import upstream snapshot with attribution

tools/get_brpc_revision.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+output=$(cat $1/RELEASE_VERSION)
+abbr_commit_hash=$(git log -1 --format="%h" 2> /dev/null)
+committer_date=($(git log -1 --format="%ci" 2> /dev/null))
+committer_date="${committer_date[0]}T${committer_date[1]}${committer_date[2]:0:3}:${committer_date[2]:3:2}"
+branch=$(git rev-parse --abbrev-ref HEAD 2> /dev/null)
+if [ $? -eq 0 ]
+then
+    output=$output"\\|"$branch"\\|"$abbr_commit_hash"\\|"$committer_date
+fi
+echo $output