Add gmock into our dependencies.

third_party/boost/boost/config/compiler/vacpp.hpp

Index: third_party/boost/boost/config/compiler/vacpp.hpp
diff --git a/third_party/boost/boost/config/compiler/vacpp.hpp b/third_party/boost/boost/config/compiler/vacpp.hpp
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+//  (C) Copyright John Maddock 2001 - 2003. 
+//  (C) Copyright Toon Knapen 2001 - 2003. 
+//  (C) Copyright Lie-Quan Lee 2001. 
+//  (C) Copyright Markus Schoepflin 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.
+
+//  Visual Age (IBM) C++ compiler setup:
+
+#if __IBMCPP__ <= 501
+#  define BOOST_NO_MEMBER_TEMPLATE_FRIENDS
+#  define BOOST_NO_MEMBER_FUNCTION_SPECIALIZATIONS
+#endif
+
+#if (__IBMCPP__ <= 502) 
+// Actually the compiler supports inclass member initialization but it
+// requires a definition for the class member and it doesn't recognize
+// it as an integral constant expression when used as a template argument.
+#  define BOOST_NO_INCLASS_MEMBER_INITIALIZATION
+#  define BOOST_NO_INTEGRAL_INT64_T
+#  define BOOST_NO_MEMBER_TEMPLATE_KEYWORD
+#endif
+
+#if (__IBMCPP__ <= 600) || !defined(BOOST_STRICT_CONFIG)
+#  define BOOST_NO_POINTER_TO_MEMBER_TEMPLATE_PARAMETERS
+#endif
+
+//
+// On AIX thread support seems to be indicated by _THREAD_SAFE:
+//
+#ifdef _THREAD_SAFE
+#  define BOOST_HAS_THREADS
+#endif
+
+#define BOOST_COMPILER "IBM Visual Age version " BOOST_STRINGIZE(__IBMCPP__)
+
+//
+// versions check:
+// we don't support Visual age prior to version 5:
+#if __IBMCPP__ < 500
+#error "Compiler not supported or configured - please reconfigure"
+#endif
+//
+// last known and checked version is 600:
+#if (__IBMCPP__ > 600)
+#  if defined(BOOST_ASSERT_CONFIG)
+#     error "Unknown compiler version - please run the configure tests and report the results"
+#  endif
+#endif
+
+// Some versions of the compiler have issues with default arguments on partial specializations
+#define BOOST_NO_PARTIAL_SPECIALIZATION_IMPLICIT_DEFAULT_ARGS
+
+
+
+