swift

4b87cb7b - [Macros] Plumb the owning module and supplemental modules through to Macro.

[Macros] Plumb the owning module and supplemental modules through to Macro. Plumb the information about the owning module and supplemental signature modules through to the Macro data structure, for both built-in and plugin macros. We're resolving the given module names into module declarations, but otherwise performing no checking and not emitting any diagnostics. This information is not yet used.