When a framework with the same name is available at multiple framework
search paths, we use the first matching location. If a framework at this
location doesn't have all the headers, it can be confusing for
developers because they see only an error 'Foo/Foo.h' file not found,
can find the complete framework with required header, and don't know the
incomplete framework was used instead.
Add a note explaining a framework without required header was found.
Also mention framework directory path to make it easier to find the