Add gmock into our dependencies.

third_party/boost/boost/config/abi_suffix.hpp

Index: third_party/boost/boost/config/abi_suffix.hpp
diff --git a/third_party/boost/boost/config/abi_suffix.hpp b/third_party/boost/boost/config/abi_suffix.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..939161662aefd79f0a38fb8a74de8ae26f87a132
--- /dev/null
+++ b/third_party/boost/boost/config/abi_suffix.hpp
@@ -0,0 +1,27 @@
+//  abi_sufffix header  -------------------------------------------------------//
+
+// (c) Copyright John Maddock 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).
+
+// This header should be #included AFTER code that was preceded by a #include
+// <boost/config/abi_prefix.hpp>.
+
+#ifndef BOOST_CONFIG_ABI_PREFIX_HPP
+# error Header boost/config/abi_suffix.hpp must only be used after boost/config/abi_prefix.hpp
+#else
+# undef BOOST_CONFIG_ABI_PREFIX_HPP
+#endif
+
+// the suffix header occurs after all of our code:
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_SUFFIX
+#endif
+
+#if defined( __BORLANDC__ )
+#pragma nopushoptwarn
+#endif
+
+