pdftk uses CNI and depends on iText. It currently bundles it, since it needs to recompile it using the old-style GCJ ABI. Can the iText package provide an old-style ABI library in addition to the BC ABI shared object it currently provides?
Actually, it should be sufficient to build iText with -fno-indirect-classes.
Note that it's only worth doing this once 236224 is resolved.
I have done some test to include the itext package instead of the bundled itext from pdftk. Unfrotunately; I have found out, that I need C-styled headers file and object modules for acces to itext.
I've just removed the itext package due to licensing problems.