swift234

Improve type resolver to understand the difference between an "immediate" function
argument and one that has been through one level of tuple type/pattern.  This allows
us to reject invalid uses of inout, instead of crashing on them later (now that we're
not doing decl-based argument processing in 1.0).

This resolves <rdar://problem/16146971> SILGen crash on 'inout' inside a tuple


Swift SVN r14578