ninja: Correctly handle copies steps in sourceless shared_library targets.

test/copies/gyptest-sourceless-shared-lib.py

Index: test/copies/gyptest-sourceless-shared-lib.py
diff --git a/test/copies/gyptest-sourceless-shared-lib.py b/test/copies/gyptest-sourceless-shared-lib.py
new file mode 100644
index 0000000000000000000000000000000000000000..6ec2e512ad22d66135b163b9c489fbb2e69563e2
--- /dev/null
+++ b/test/copies/gyptest-sourceless-shared-lib.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2009 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.
+
+"""
+Verifies copies in sourceless shared_library targets are executed.
+"""
+
+import TestGyp
+
+test = TestGyp.TestGyp()
+test.run_gyp('copies-sourceless-shared-lib.gyp', chdir='src')
+test.relocate('src', 'relocate/src')
+test.build('copies-sourceless-shared-lib.gyp', chdir='relocate/src')
+test.built_file_must_match('copies-out/file1',
+                           'file1 contents\n',
+                           chdir='relocate/src')
+test.pass_test()