chore: import upstream snapshot with attribution

3rd_party/flatbuffers/tests/JavaTest.bat

@@ -0,0 +1,21 @@
+@echo off
+rem Copyright 2014 Google Inc. All rights reserved.
+rem
+rem Licensed under the Apache License, Version 2.0 (the "License");
+rem you may not use this file except in compliance with the License.
+rem You may obtain a copy of the License at
+rem
+rem     http://www.apache.org/licenses/LICENSE-2.0
+rem
+rem Unless required by applicable law or agreed to in writing, software
+rem distributed under the License is distributed on an "AS IS" BASIS,
+rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+rem See the License for the specific language governing permissions and
+rem limitations under the License.
+
+rem Compile then run the Java test.
+
+set batch_file_dir=%~d0%~p0
+
+javac -g -classpath %batch_file_dir%\..\java;%batch_file_dir%;%batch_file_dir%\namespace_test JavaTest.java
+java -classpath %batch_file_dir%\..\java;%batch_file_dir%;%batch_file_dir%\namespace_test JavaTest