Add gmock into our dependencies.

third_party/boost/boost/config/stdlib/libcomo.hpp

Index: third_party/boost/boost/config/stdlib/libcomo.hpp
diff --git a/third_party/boost/boost/config/stdlib/libcomo.hpp b/third_party/boost/boost/config/stdlib/libcomo.hpp
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+//  (C) Copyright John Maddock 2002 - 2003. 
+//  (C) Copyright Jens Maurer 2002 - 2003. 
+//  (C) Copyright Beman Dawes 2002 - 2003. 
+//  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.
+
+//  Comeau STL:
+
+#if !defined(__LIBCOMO__)
+#  include <boost/config/no_tr1/utility.hpp>
+#  if !defined(__LIBCOMO__)
+#      error "This is not the Comeau STL!"
+#  endif
+#endif
+
+//
+// std::streambuf<wchar_t> is non-standard
+// NOTE: versions of libcomo prior to beta28 have octal version numbering,
+// e.g. version 25 is 21 (dec)
+#if __LIBCOMO_VERSION__ <= 22
+#  define BOOST_NO_STD_WSTREAMBUF
+#endif
+
+#if (__LIBCOMO_VERSION__ <= 31) && defined(_WIN32)
+#define BOOST_NO_SWPRINTF
+#endif
+
+#if __LIBCOMO_VERSION__ >= 31
+#  define BOOST_HAS_HASH
+#  define BOOST_HAS_SLIST
+#endif
+
+//
+// Intrinsic type_traits support.
+// The SGI STL has it's own __type_traits class, which
+// has intrinsic compiler support with SGI's compilers.
+// Whatever map SGI style type traits to boost equivalents:
+//
+#define BOOST_HAS_SGI_TYPE_TRAITS
+
+#define BOOST_STDLIB "Comeau standard library " BOOST_STRINGIZE(__LIBCOMO_VERSION__)
+
+