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

build/android/push_libraries.gypi

Index: build/android/push_libraries.gypi
diff --git a/build/android/push_libraries.gypi b/build/android/push_libraries.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..773c44f8ab1ccd17e177d55baea5ab58f0c2e377
--- /dev/null
+++ b/build/android/push_libraries.gypi
@@ -0,0 +1,49 @@
+# Copyright 2013 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.
+
+# This file is meant to be included into an action to provide a rule that
+# pushes stripped shared libraries to the attached Android device. This should
+# only be used with the gyp_managed_install flag set.
+#
+# To use this, create a gyp target with the following form:
+#  {
+#    'actions': [
+#      'variables': {
+#        'ordered_libraries_file': 'file generated by write_ordered_libraries'
+#        'strip_stamp': 'stamp from strip action to block on'
+#        'libraries_source_dir': 'location where stripped libraries are stored'
+#        'device_library_dir': 'location on the device where to put pushed libraries',
+#        'push_stamp': 'file to touch when the action is complete'
+#        'configuration_name': 'The build CONFIGURATION_NAME'
+#      },
+#      'includes': [ '../../build/android/push_libraries.gypi' ],
+#    ],
+#  },
+#
+
+{
+  'action_name': 'push_libraries_<(_target_name)',
+  'message': 'Pushing libraries to device for <(_target_name)',
+  'inputs': [
+    '<(DEPTH)/build/android/gyp/util/build_utils.py',
+    '<(DEPTH)/build/android/gyp/util/md5_check.py',
+    '<(DEPTH)/build/android/gyp/push_libraries.py',
+    '<(strip_stamp)',
+    '<(strip_additional_stamp)',
+    '<(build_device_config_path)',
+    '<(pack_relocations_stamp)',
+  ],
+  'outputs': [
+    '<(push_stamp)',
+  ],
+  'action': [
+    'python', '<(DEPTH)/build/android/gyp/push_libraries.py',
+    '--build-device-configuration=<(build_device_config_path)',
+    '--libraries-dir=<(libraries_source_dir)',
+    '--device-dir=<(device_library_dir)',
+    '--libraries=@FileArg(<(ordered_libraries_file):libraries)',
+    '--stamp=<(push_stamp)',
+    '--configuration-name=<(configuration_name)',
+  ],
+}