Out-of-tree builds put JuliaSyntax symlink in source directory

[maleadt]

Despite doing an out-of-tree build (make O=build/dev configure), the build system puts a JuliaSyntax symlink in the base source directory:

❯ ls -la base/JuliaSyntax
 base/JuliaSyntax -> build/dev/deps/JuliaSyntax-045d156c44dbb87769c7416d049a7c08908539d4/

This can result in surprising behavior when using multiple out-of-tree builds.

Is there a reason the JuliaSyntax stdlib is treated differently from other standard libraries?

[vtjnash]

Duplicate of #31140. Fixed by #45441. Reverted by #46420, since people don't like change.

[KristofferC]

Reverted by #46420, since people don't like change.

IIRC the issue was getting duplicated results when grepping in the code base?