Fix build onAlpine Linux (#13394) ...like elsewhere. Added by https://github.com/mono/mono/pull/11855 ...return value. Added by https://github.com/mono/mono/pull/13333
[bcl] Fix assembly identity of nunit/nunitlite(#12725) ...strong name key added in https://github.com/mono/mono/commit/acaa73b7026897f7e8... ...old .snk is invalid (see https://github.com/dotnet/roslyn/issues/32502),