Add X11_LIBRARIES to the link flags for tkwin driver since it explicitly uses functions from the X11 library.
Add X11_LIBRARIES to the link flags for tkwin driver since it explicitly uses functions from the X11 library.


svn path=/trunk/; revision=12220

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot