Dub relinks project that have path-only dependencies

[Geod24]

SDC has paths only dependencies, no dependency on the registry, hence a dub.selections.json is useless (empty).
However, since it is not present, dub always relinks, as the logic is too naive:

dub/source/dub/generators/build.d

Line 532 in ef0bf93

if (checkSelectedVersions && main_pack is m_project.rootPackage && m_project.rootPackage.getAllDependencies().length > 0)

Workaround is simple but shouldn't be needed: snazzy-d/sdc#360