Sorry for the mess, that was an obvious mistake, I should have thought twice
about it before pushing.

Efraim, let me know if you can't push, then I'll do it.

That said, I wonder why we need so many old Clangs.  For instance, I see we only
use clang-3.9.1 for DarkTable and c-reduce.  c-reduce could be updated according
to the comment.  And DarkTable builds fine with clang 7 according to Arch Linux.
(Maybe they are wrong.)

Either way, I think it would be a good idea to always comment why some specific
version of a program has to be used, lest we see a plethora of versions grow,
which makes maintenance a bit harder sometimes.

Thoughts?

-- 
Pierre Neidhardt
https://ambrevar.xyz/