Avoid a temporary file and executing FileCheck multiple types and prefer
multiple check prefixes and streaming. Additionally, enable some of
previously XFAIL'ed tests on Linux as well as tests that were marked as
requiring Objective-C interop.
We could support this in the future but right now it's causing problems.
There's also a potential ambiguity issue here where a protocol and class
could have the same name.
In addition to updating the importer, remove the two entries from the
CryptoTokenKit API notes that were trying to use this feature.
rdar://problem/27990168
