swift234

Test updates for default keyword argument changes <rdar://problem/16741975>.

TL;DR. You don't want to read this patch. Mostly, it's adjusting to
the fact that global functions no longer have keyword arguments by
default, which affects nearly every SIL- and IR-test, as well as the
IDE-related tests. I've tried to generalize the SIL and IR tests to be
more resilient against such mangling changes, but I've surely missed
some.


Swift SVN r17058