[MacOS] build Warning about fastlane

[mastef]

Related issue mogol/flutter_secure_storage#600 which it seems some people solved by renaming DT_TOOLCHAIN_DIR to TOOLCHAIN_DIR

[cbracken]

This is now fixed on Flutter master branch as of flutter/flutter#138243

[mastef]

@cbracken if I read the commit correctly they are just filtering it from the output logs it seems?

[cbracken]

Correct this is an Xcode issue rather than a flutter issue. The warning is asking the reader to file a Radar against Xcode at feedback.apple.com. The build itself proceeds correctly. Xcode is doing the same in its own console within the IDE.

[mastef]

@cbracken initial issue here seems to be that @car5ten can't archive his app due to this?

So possibly another issue may be blocking the archiving then - or if this is the main blocker then hiding the log doesn't seem like a solution

[stanogn]

Hey, i also have issues with this (on some machines only, weirdly). I cannot build. It fails after a bunch of these messages and a few more warnings (which were present before without issues).