Commit details:
1) in OSD_PerfMeter, use static functions of OSD_Chronometer class for time measurements instead of specific code to avoid incorrect results on CentOS (due to wrong valus of CLK_TCK);
2) changed definition of OSD_PerfMeter from .c to .cxx to avoid problems with C-functions;
3) fixed OSD_PerfMeter.h for building on Unix systems;
4) removed platform-specific #defines;
5) added test case for OSD_PerfMeter as bugs fclasses bug23237;
6) Removed DebugTools package (duplicates OSD_PerfMeter)
7) Avoid compiler (GCC) error casting BRepPrimAPI_Make* instances to TopoDS_Shape
