Enable /bigobj on windows builds to fix build failures.

cmake/ACGCompiler.cmake

@@ -39,6 +39,9 @@ if ( WIN32 )
     endif()
   endforeach()
 
+  # Support large obj files (only costs compatibility with <MSVC 2005 linkers)
+  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /bigobj")
+
 endif( WIN32 )
 
 if (UNIX)