Add gmock into our dependencies.

third_party/boost/boost/config/platform/linux.hpp

Index: third_party/boost/boost/config/platform/linux.hpp
diff --git a/third_party/boost/boost/config/platform/linux.hpp b/third_party/boost/boost/config/platform/linux.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..51ae13347cdcbba4fde2c6bbfb68d877c49da62f
--- /dev/null
+++ b/third_party/boost/boost/config/platform/linux.hpp
@@ -0,0 +1,98 @@
+//  (C) Copyright John Maddock 2001 - 2003. 
+//  (C) Copyright Jens Maurer 2001 - 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.
+
+//  linux specific config options:
+
+#define BOOST_PLATFORM "linux"
+
+// make sure we have __GLIBC_PREREQ if available at all
+#include <cstdlib>
+
+//
+// <stdint.h> added to glibc 2.1.1
+// We can only test for 2.1 though:
+//
+#if defined(__GLIBC__) && ((__GLIBC__ > 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 1)))
+   // <stdint.h> defines int64_t unconditionally, but <sys/types.h> defines
+   // int64_t only if __GNUC__.  Thus, assume a fully usable <stdint.h>
+   // only when using GCC.
+#  if defined __GNUC__
+#    define BOOST_HAS_STDINT_H
+#  endif
+#endif
+
+#if defined(__LIBCOMO__)
+   //
+   // como on linux doesn't have std:: c functions:
+   // NOTE: versions of libcomo prior to beta28 have octal version numbering,
+   // e.g. version 25 is 21 (dec)
+   //
+#  if __LIBCOMO_VERSION__ <= 20
+#    define BOOST_NO_STDC_NAMESPACE
+#  endif
+
+#  if __LIBCOMO_VERSION__ <= 21
+#    define BOOST_NO_SWPRINTF
+#  endif
+
+#endif
+
+//
+// If glibc is past version 2 then we definitely have
+// gettimeofday, earlier versions may or may not have it:
+//
+#if defined(__GLIBC__) && (__GLIBC__ >= 2)
+#  define BOOST_HAS_GETTIMEOFDAY
+#endif
+
+#ifdef __USE_POSIX199309
+#  define BOOST_HAS_NANOSLEEP
+#endif
+
+#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
+// __GLIBC_PREREQ is available since 2.1.2
+
+   // swprintf is available since glibc 2.2.0
+#  if !__GLIBC_PREREQ(2,2) || (!defined(__USE_ISOC99) && !defined(__USE_UNIX98))
+#    define BOOST_NO_SWPRINTF
+#  endif
+#else
+#  define BOOST_NO_SWPRINTF
+#endif
+
+// boilerplate code:
+#define BOOST_HAS_UNISTD_H
+#include <boost/config/posix_features.hpp>
+
+#ifndef __GNUC__
+//
+// if the compiler is not gcc we still need to be able to parse
+// the GNU system headers, some of which (mainly <stdint.h>)
+// use GNU specific extensions:
+//
+#  ifndef __extension__
+#     define __extension__
+#  endif
+#  ifndef __const__
+#     define __const__ const
+#  endif
+#  ifndef __volatile__
+#     define __volatile__ volatile
+#  endif
+#  ifndef __signed__
+#     define __signed__ signed
+#  endif
+#  ifndef __typeof__
+#     define __typeof__ typeof
+#  endif
+#  ifndef __inline__
+#     define __inline__ inline
+#  endif
+#endif
+
+