Update to 3.3.11
    
    - New upstream release 3.3.11
      - new tcl function: gtkwave::installFileFilter
      - new tcl function: gtkwave::installProcFilter
      - new tcl function: gtkwave::installTransFilter
      - new tcl function: gtkwave::setCurrentTranslateFile
      - new tcl function: gtkwave::setCurrentTranslateProc
      - new tcl function: gtkwave::setCurrentTranslateTransProc
      - new tcl function: gtkwave::setCurrentTranslateEnums
      - nested `ifdef fix for Vermin
      - fix for free to non-malloc'd address problem in repscripts
      - start to build a framework to support Tcl variable change callbacks
      - fix for 0 millisecond Tcl timer causing 100% CPU usage
      - add CVS versus ModelSim compatibility fixes for Bluespec savefiles
      - fix atoi_64 in presence of some garbage non-numerics
    - Add patch to fix building without Tcl
    - Explicitly disable Tcl where it won't build