Add a snapshot of flutter/engine/src/build to our sdk

build/android/gyp/create_dist_jar.py

Index: build/android/gyp/create_dist_jar.py
diff --git a/build/android/gyp/create_dist_jar.py b/build/android/gyp/create_dist_jar.py
new file mode 100755
index 0000000000000000000000000000000000000000..0d31c5db93f5c8329df40842871719b843d3848d
--- /dev/null
+++ b/build/android/gyp/create_dist_jar.py
@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+#
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Merges a list of jars into a single jar."""
+
+import optparse
+import sys
+
+from util import build_utils
+
+def main(args):
+  args = build_utils.ExpandFileArgs(args)
+  parser = optparse.OptionParser()
+  build_utils.AddDepfileOption(parser)
+  parser.add_option('--output', help='Path to output jar.')
+  parser.add_option('--inputs', action='append', help='List of jar inputs.')
+  options, _ = parser.parse_args(args)
+  build_utils.CheckOptions(options, parser, ['output', 'inputs'])
+
+  input_jars = []
+  for inputs_arg in options.inputs:
+    input_jars.extend(build_utils.ParseGypList(inputs_arg))
+
+  build_utils.MergeZips(options.output, input_jars)
+
+  if options.depfile:
+    build_utils.WriteDepfile(
+        options.depfile,
+        input_jars + build_utils.GetPythonDependencies())
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv[1:]))