Calculate and set the type relation in each result building logic which
knows the actual result type.
CodeCompletionResultBuilder couldn't know the actual result type. From
the declaration alone, it cannot know the correct result type because it
doesn't know how the declaration is used (e.g. calling? referencing by
compound name? curried?)
Most tests were using %swift or similar substitutions, which did not
include the target triple and SDK. The driver was defaulting to the
host OS. Thus, we could not run the tests when the standard library was
not built for OS X.
Swift SVN r24504
