Add gmock into our dependencies.

third_party/boost/boost/config/select_stdlib_config.hpp

Index: third_party/boost/boost/config/select_stdlib_config.hpp
diff --git a/third_party/boost/boost/config/select_stdlib_config.hpp b/third_party/boost/boost/config/select_stdlib_config.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..13e5e4cef021b7b50d06a804b0945f6df48bd346
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+++ b/third_party/boost/boost/config/select_stdlib_config.hpp
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+//  Boost compiler configuration selection header file
+
+//  (C) Copyright John Maddock 2001 - 2003. 
+//  (C) Copyright Jens Maurer 2001 - 2002. 
+//  Use, modification and distribution are subject to 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 for most recent version.
+
+// locate which std lib we are using and define BOOST_STDLIB_CONFIG as needed:
+
+// we need to include a std lib header here in order to detect which
+// library is in use, use <utility> as it's about the smallest
+// of the std lib headers - do not rely on this header being included -
+// users can short-circuit this header if they know whose std lib
+// they are using.
+
+#include <boost/config/no_tr1/utility.hpp>
+
+#if defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)
+// STLPort library; this _must_ come first, otherwise since
+// STLport typically sits on top of some other library, we
+// can end up detecting that first rather than STLport:
+#  define BOOST_STDLIB_CONFIG "boost/config/stdlib/stlport.hpp"
+
+#elif defined(__LIBCOMO__)
+// Comeau STL:
+#define BOOST_STDLIB_CONFIG "boost/config/stdlib/libcomo.hpp"
+
+#elif defined(__STD_RWCOMPILER_H__) || defined(_RWSTD_VER)
+// Rogue Wave library:
+#  define BOOST_STDLIB_CONFIG "boost/config/stdlib/roguewave.hpp"
+
+#elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
+// GNU libstdc++ 3
+#  define BOOST_STDLIB_CONFIG "boost/config/stdlib/libstdcpp3.hpp"
+
+#elif defined(__STL_CONFIG_H)
+// generic SGI STL
+#  define BOOST_STDLIB_CONFIG "boost/config/stdlib/sgi.hpp"
+
+#elif defined(__MSL_CPP__)
+// MSL standard lib:
+#  define BOOST_STDLIB_CONFIG "boost/config/stdlib/msl.hpp"
+
+#elif defined(__IBMCPP__)
+// take the default VACPP std lib
+#  define BOOST_STDLIB_CONFIG "boost/config/stdlib/vacpp.hpp"
+
+#elif defined(MSIPL_COMPILE_H)
+// Modena C++ standard library
+#  define BOOST_STDLIB_CONFIG "boost/config/stdlib/modena.hpp"
+
+#elif (defined(_YVALS) && !defined(__IBMCPP__)) || defined(_CPPLIB_VER)
+// Dinkumware Library (this has to appear after any possible replacement libraries):
+#  define BOOST_STDLIB_CONFIG "boost/config/stdlib/dinkumware.hpp"
+
+#elif defined (BOOST_ASSERT_CONFIG)
+// this must come last - generate an error if we don't
+// recognise the library:
+#  error "Unknown standard library - please configure and report the results to boost.org"
+
+#endif
+
+
+