Add all extra GTK libraries to GUI_TK_LIBRARY in configure.

Add all extra GTK libraries to GUI_TK_LIBRARY in configure.

Some libraries (e.g. Pango) were added to GUI_TK_LIBRARY already while others
(e.g. Hildon) had their own EXTRALIBS_HILDON variables that were then added to
EXTRALIBS_GUI separately. Finally, some others were simply broken because
neither EXTRALIBS_GNOMEVFS nor EXTRALIBS_GTKPRINT were set anywhere.

Standardize on using GUI_TK_LIBRARY for everything.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72216 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775