fix: support new trace compiler features for preventing clashes. Automatically turn on OST_TRACE_COMPILER_IN_USE macro. Look for trace header in systemincludes. Make directories in makefile parse to prevent clashes during build. Correct path for autogen headers. Correct case issue with autogen headers on Linux.

   1: Apache Jakarta HttpClient
    2: Copyright 1999-2007 The Apache Software Foundation
    3: 
    4: This product includes software developed by
    5: The Apache Software Foundation (http://www.apache.org/).