This adds in the GYP files needed for our GYP build.

build/all.gyp

+# Copyright (c) 2009 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.
+
+{
+  'includes': [
+    '../../build/common.gypi',
+    'common.gypi',
+  ],
+  'targets': [
+    {
+      'target_name': 'All',
+      'type': 'none',
+      'dependencies': [
+        '../../<(antlrdir)/antlr.gyp:*',
+        '../../<(fcolladadir)/fcollada.gyp:*',
+        '../../<(jpegdir)/libjpeg.gyp:*',
+        '../../<(pngdir)/libpng.gyp:*',
+        '../../<(zlibdir)/zlib.gyp:*',
+        '../../base/base.gyp:base',
+        '../../breakpad/breakpad.gyp:*',
+        '../compiler/technique/technique.gyp:*',
+        '../converter/converter.gyp:*',
+        '../core/core.gyp:*',
+        '../import/import.gyp:*',
+        '../plugin/idl/idl.gyp:*',
+        '../plugin/plugin.gyp:*',
+        '../serializer/serializer.gyp:*',
+        '../utils/utils.gyp:*',
+      ],
+    },
+  ],
+}