In practice, the differences between recent ABI versions don't seem to be
incompatible since they apparently only affect obscure corner cases. So
suppress this error so we don't have to rebuild the entire wx world in one
go.
* Add a d/gbp.conf file
* Update to new upstream release 3.2.11
* Update Standards-Version to 4.7.4 (no changes needed)
* Drop redundant fields from d/control
* Replace FSF postal address in d/copyright
* Add a d/upstream/metadata file
* Update lintian overrides
* Add patch to update unicode mapping tables