[Validator] Error when xcodebuild fails

This bug was never shipped in a release, it only existed in master and
thus is not a change from the previous release.

This reverts commit 67514193.

Support for Frameworks / Swift

[Refactor] Rename Installer#determine_dependency_product_type to #determine_dependency_product_types

Thanks @segiddins.

This reverts commit a23a07e49c29b4def57f13160369f175c66cf585.

Thanks @segiddins.

Thanks @segiddins.

This let lint use frameworks to install the given spec.