ki18n 5.45 issue for Plasma workspace 5.12.5

[Jonathan Riddell]

Plasma Workspace 5.12.5 has an issue when compiled with ki18n 5.45,
cmake can get confused if your build path is long and hang until it
runs out of memory.

Should be fixed by
Diff 12216 "Don't need to run previous iterations commands again"
[Closed] https://phabricator.kde.org/D12216

https://cgit.kde.org/ki18n.git/commit/?id=9c32bdab29b345976eee3b9c1c4bebd76cdcdde2

Jonathan