Fix warning linking static libraries on OS X 10.9

pylib/gyp/mac_tool.py

Index: pylib/gyp/mac_tool.py
diff --git a/pylib/gyp/mac_tool.py b/pylib/gyp/mac_tool.py
index 3a28a17b949d5abab06a40455734c916031e481c..d8485a2039a19cb63c5bb85fde97b155309bb039 100755
--- a/pylib/gyp/mac_tool.py
+++ b/pylib/gyp/mac_tool.py
@@ -200,8 +200,9 @@ class MacTool(object):
     return subprocess.call(cmd_list)
 
   def ExecFilterLibtool(self, *cmd_list):
-    """Calls libtool and filters out 'libtool: file: foo.o has no symbols'."""
-    libtool_re = re.compile(r'^libtool: file: .* has no symbols$')
+    """Calls libtool and filters out '/path/to/libtool: file: foo.o has no
+    symbols'."""
+    libtool_re = re.compile(r'^.*libtool: file: .* has no symbols$')
     libtoolout = subprocess.Popen(cmd_list, stderr=subprocess.PIPE)
     _, err = libtoolout.communicate()
     for line in err.splitlines():