Many of the system tools seems to be written in Swift now, which results
in a warning when running them:
swift runtime: backtrace-on-crash is not supported for privileged
executables
Luckily we can silence this warning via 'warnings=suppressed'.
See https://forums.swift.org/t/suppressing-backtrace-warnings/79235
Change-Id: I09b97553d996269fd4c9d23bf52a319bf964c833
Reviewed-by: Ville-Pekka Karhu <ville-pekka.karhu@qt.io>