Add gmock into our dependencies.

third_party/boost/boost/config/compiler/pgi.hpp

Index: third_party/boost/boost/config/compiler/pgi.hpp
diff --git a/third_party/boost/boost/config/compiler/pgi.hpp b/third_party/boost/boost/config/compiler/pgi.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..0f88d38e9970da2534b603a1b59feea5d2d52438
--- /dev/null
+++ b/third_party/boost/boost/config/compiler/pgi.hpp
@@ -0,0 +1,33 @@
+//  (C) Copyright Noel Belcourt 2007.
+//  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.
+
+//  PGI C++ compiler setup:
+
+#define BOOST_COMPILER_VERSION __PGIC__##__PGIC_MINOR__
+#define BOOST_COMPILER "PGI compiler version " BOOST_STRINGIZE(_COMPILER_VERSION)
+
+//
+// Threading support:
+// Turn this on unconditionally here, it will get turned off again later
+// if no threading API is detected.
+//
+
+#if (__PGIC__ == 7) && (__PGIC_MINOR__ == 1)
+
+#define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL 
+#define BOOST_NO_TWO_PHASE_NAME_LOOKUP
+#define BOOST_NO_SWPRINTF
+
+#else
+
+#  error "Pgi compiler not configured - please reconfigure"
+
+#endif
+//
+// version check:
+// probably nothing to do here?
+