Add gmock into our dependencies.

third_party/boost/boost/config/platform/aix.hpp

Index: third_party/boost/boost/config/platform/aix.hpp
diff --git a/third_party/boost/boost/config/platform/aix.hpp b/third_party/boost/boost/config/platform/aix.hpp
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index 0000000000000000000000000000000000000000..894ef42ce919980bc9f9f852dbad12e370a72c07
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+//  (C) Copyright John Maddock 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.
+
+//  IBM/Aix specific config options:
+
+#define BOOST_PLATFORM "IBM Aix"
+
+#define BOOST_HAS_UNISTD_H
+#define BOOST_HAS_NL_TYPES_H
+#define BOOST_HAS_NANOSLEEP
+#define BOOST_HAS_CLOCK_GETTIME
+
+// This needs support in "boost/cstdint.hpp" exactly like FreeBSD.
+// This platform has header named <inttypes.h> which includes all
+// the things needed.
+#define BOOST_HAS_STDINT_H
+
+// Threading API's:
+#define BOOST_HAS_PTHREADS
+#define BOOST_HAS_PTHREAD_DELAY_NP
+#define BOOST_HAS_SCHED_YIELD
+//#define BOOST_HAS_PTHREAD_YIELD
+
+// boilerplate code:
+#include <boost/config/posix_features.hpp>
+
+
+
+