PNG images are used by the main wxWidgets library itself now and so linking
with the monolithic wx library introduces dependencies on PNG as well, even
for the console applications. Link them with linpng to avoid linker errors.
Closes#12889.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66848 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Update configure and bakefile.m4 for the new version too.
Also add the missing makefiles and projects for the XTI sample.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66836 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775