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
...in a quest for completeness. ArrayTypes don't actually work yet
(single-dimensional arrays are typed as slices), but when they do the test
that is currently XFAIL'd should start passing.
With this, all non-transient types can now be serialized and deserialized.
Swift SVN r6101
