Change ninja rpath generation to be more like make.

test/linux/gyptest-implicit-rpath.py

Index: test/linux/gyptest-implicit-rpath.py
===================================================================
--- test/linux/gyptest-implicit-rpath.py	(revision 0)
+++ test/linux/gyptest-implicit-rpath.py	(revision 0)
@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2013 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 that the implicit rpath is added only when needed.
+"""
+
+import TestGyp
+
+import re
+import subprocess
+import sys
+
+if sys.platform.startswith('linux'):
+  test = TestGyp.TestGyp(formats=['ninja', 'make'])
+
+  CHDIR = 'implicit-rpath'
+  test.run_gyp('test.gyp', chdir=CHDIR)
+  test.build('test.gyp', test.ALL, chdir=CHDIR)
+
+  def GetRpaths(p):
+    p = test.built_file_path(p, chdir=CHDIR)
+    r = re.compile(r'Library rpath: \[([^\]]+)\]')
+    proc = subprocess.Popen(['readelf', '-d', p], stdout=subprocess.PIPE)
+    o = proc.communicate()[0]
+    assert not proc.returncode
+    return r.findall(o)
+
+  if test.format == 'ninja':
+    expect = '$ORIGIN/lib/'
+  elif test.format == 'make':
+    expect = '$ORIGIN/lib.target/'
+  else:
+    test.fail_test()
+
+  if GetRpaths('shared_executable') != [expect]:
+    test.fail_test()
+
+  if GetRpaths('static_executable'):
+    test.fail_test()
+
+  test.pass_test()