universal-ctags: 2017-09-22 -> 2018-01-05

Fixup of https://github.com/NixOS/nixpkgs/issues/33124 (ctags failed to
create its temporary files when TMPDIR was not in environment). I used
the opportunity to bump version with the improvements made to ctags to
help diagnose these kinds of errors:
https://github.com/universal-ctags/ctags/pull/1648