Use BUILD_DEPENDS+=devel/libtool instead of USE_LIBTOOL=gnu, as
suggested by sthen@. Get rid of PFRAG.shared while there.
Remove MODULES as the bindings were not built actually anyway and
are not needed for Nepomuk (the only Virtuoso user as of now).
Also, explicitly disable Kerberos because Virtuoso doesn't support
Heimdal (ours) one.
Add some patches missed before, another bump for safety.
Allow to disable GETTEXT_PROCESS_PO_FILES() calls patching.
Don't enable GETTEXT_PROCESS_PO_FILES() patching for KDE SC except l10n,
just not needed.