Fix gyp->make translation of rules with several outputs.

test/actions-multiple-outputs-with-dependencies/src/action.gyp

+# Copyright (c) 2015 Google Inc. 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': 'upper',
+      'type': 'none',
+      'actions': [{
+        'action_name': 'upper_action',
+        'inputs': ['<(PRODUCT_DIR)/out2.txt'],
+        'outputs': ['<(PRODUCT_DIR)/result.txt'],
+        'action': ['python', 'rcopy.py', '<@(_inputs)', '<@(_outputs)'],
+      }],
+    },
+    {
+      'target_name': 'lower',
+      'type': 'none',
+      'actions': [{
+        'action_name': 'lower_action',
+        'inputs': ['input.txt'],
+        'outputs': ['<(PRODUCT_DIR)/out1.txt', '<(PRODUCT_DIR)/out2.txt'],
+        'action': ['python', 'rcopy.py', '<@(_inputs)', '<@(_outputs)'],
+      }],
+    },
+  ],
+}