Add mechanism for including newly introduced info subpaths

[dempseyatgithub]

BSE logs if it cannot find a subpath. When a new version of Xcode introduces a subpath and it is added to BSE, the log will appear when run with older versions of Xcode installed.

Add a mechanism to only look for a subpath starting with the Xcode version it was introduced. Will use an approach similar to the deprecated subpath mechanism.