Add gmock into our dependencies.

third_party/boost/boost/mpl/aux_/config/has_xxx.hpp

Index: third_party/boost/boost/mpl/aux_/config/has_xxx.hpp
diff --git a/third_party/boost/boost/mpl/aux_/config/has_xxx.hpp b/third_party/boost/boost/mpl/aux_/config/has_xxx.hpp
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index 0000000000000000000000000000000000000000..486d511b544d586b17f1c1a53f42e196df29ea8a
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+++ b/third_party/boost/boost/mpl/aux_/config/has_xxx.hpp
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+
+#ifndef BOOST_MPL_AUX_CONFIG_HAS_XXX_HPP_INCLUDED
+#define BOOST_MPL_AUX_CONFIG_HAS_XXX_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2002-2004
+// Copyright David Abrahams 2002-2003
+//
+// Distributed under the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at 
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Source$
+// $Date: 2004-09-03 11:56:59 -0400 (Fri, 03 Sep 2004) $
+// $Revision: 24892 $
+
+#include <boost/mpl/aux_/config/overload_resolution.hpp>
+#include <boost/mpl/aux_/config/workaround.hpp>
+
+// agurt, 11/jan/03: signals a stub-only 'has_xxx' implementation
+
+#if !defined(BOOST_MPL_CFG_NO_HAS_XXX) \
+    && (   defined(BOOST_MPL_CFG_BROKEN_OVERLOAD_RESOLUTION) \
+        || BOOST_WORKAROUND(__GNUC__, <= 2) \
+        || BOOST_WORKAROUND(__DMC__, BOOST_TESTED_AT(0x840)) \
+        )
+
+#   define BOOST_MPL_CFG_NO_HAS_XXX
+
+#endif
+
+#endif // BOOST_MPL_AUX_CONFIG_HAS_XXX_HPP_INCLUDED