Azure CI: Fix rebuild failures
Azure CI: Fix rebuild failures

In general it makes sense to abort the build if a step fails. Do so.
Otherwise if the tests fail the build artifacts will still be published.
Then a rebuild will be impossible to succeed, as the re-build won't be able
to upload its artifacts, as they are already there from the first build.

salortiz/rakudo,salortiz/rakudo,tony-o/rakudo,tbrowder/rakudo,labster/rakudo,tbrowder/rakudo,tony-o/rakudo,MasterDuke17/rakudo,salortiz/rakudo,rakudo/rakudo,rakudo/rakudo,labster/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,salortiz/rakudo,rakudo/rakudo,tbrowder/rakudo,rakudo/rakudo,MasterDuke17/rakudo,labster/rakudo,labster/rakudo,tbrowder/rakudo,salortiz/rakudo,labster/rakudo,tony-o/rakudo,rakudo/rakudo,tony-o/rakudo,tony-o/rakudo,rakudo/rakudo,tony-o/rakudo,tbrowder/rakudo,salortiz/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,labster/rakudo