[Issue 17500] Add a CLI flag configure the location for AST dumps produced by -vcg-ast

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17500

Richard Cattermole <alphaglosined at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alphaglosined at gmail.com

--- Comment #1 from Richard Cattermole <alphaglosined at gmail.com> ---
This has come up on Discord in relation to dub.

It was surprising to the user that the location was tied to the source file
rather than the project directory.

It would be ideal if dub could change the location automatically if the flag is
passed so that it would be less of a surprise.

--