All/Linux: Update llqtwebkit to latest all-shared lib build. Linux package

assembly updated to deal with Qt libraries and discrete codec and imageformat
plugins (which live under bin/llplugin).  Functioning Linux viewer with MoaP
support with a few image problems (sRGB profile, zlib errors).  Much of this
expected to be due to the new 1.6.8/1.2.8 libpng/libz and we'll fix as needed.