[Issue 14274] tools/update.sh must install and use dmd 2.066.1 if not present

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=14274

--- Comment #3 from Andrei Alexandrescu <andrei at erdani.com> ---
Are we sure the issue described in
https://forum.dlang.org/post/r5e8uj$i1b$1@digitalmars.com did not break this?
Or would that deserve its own bug report?

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