Bug#972198: ecflow b-d's on python3-all-dev, but only builds for the default python3 version

[Matthias Klose]

Package: src:ecflow
Version: 5.5.3-1

ecflow b-d's on python3-all-dev, but only builds for the default python3
version.

Either b-d on python3-dev, or build for all supported python3 versions.