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

build/linux/unbundle/libjpeg.gyp

Index: build/linux/unbundle/libjpeg.gyp
diff --git a/build/linux/unbundle/libjpeg.gyp b/build/linux/unbundle/libjpeg.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..f56e7aa614109c70ec8cc009e91e4876b3eadc70
--- /dev/null
+++ b/build/linux/unbundle/libjpeg.gyp
@@ -0,0 +1,29 @@
+# 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.
+
+{
+  'targets': [
+    {
+      'target_name': 'libjpeg',
+      'type': 'none',
+      'direct_dependent_settings': {
+        'defines': [
+          'USE_SYSTEM_LIBJPEG',
+        ],
+        'conditions': [
+          ['os_bsd==1', {
+            'include_dirs': [
+              '/usr/local/include',
+            ],
+          }],
+        ],
+      },
+      'link_settings': {
+        'libraries': [
+          '-ljpeg',
+        ],
+      },
+    }
+  ],
+}