Add gmock into our dependencies.

third_party/boost/boost/config/compiler/kai.hpp

Index: third_party/boost/boost/config/compiler/kai.hpp
diff --git a/third_party/boost/boost/config/compiler/kai.hpp b/third_party/boost/boost/config/compiler/kai.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..de16f1a67583ae58c59e1114e7e99379be11583b
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+++ b/third_party/boost/boost/config/compiler/kai.hpp
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+//  (C) Copyright John Maddock 2001. 
+//  (C) Copyright David Abrahams 2002. 
+//  (C) Copyright Aleksey Gurtovoy 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.
+
+//  Kai C++ compiler setup:
+
+#include "boost/config/compiler/common_edg.hpp"
+
+#   if (__KCC_VERSION <= 4001) || !defined(BOOST_STRICT_CONFIG)
+      // at least on Sun, the contents of <cwchar> is not in namespace std
+#     define BOOST_NO_STDC_NAMESPACE
+#   endif
+
+// see also common_edg.hpp which needs a special check for __KCC
+# if !defined(_EXCEPTIONS)
+#     define BOOST_NO_EXCEPTIONS
+# endif
+
+#define BOOST_COMPILER "Kai C++ version " BOOST_STRINGIZE(__KCC_VERSION)
+
+//
+// last known and checked version is 4001:
+#if (__KCC_VERSION > 4001)
+#  if defined(BOOST_ASSERT_CONFIG)
+#     error "Unknown compiler version - please run the configure tests and report the results"
+#  endif
+#endif
+
+
+