[cxx-interop] Add `CxxShim` library; move `__swift_interopStaticCast` into it.#59754

Merged

zoecarver merged 2 commits intoswiftlang:mainfrom

zoecarver:fix-static-down-cast-shim

Jul 6, 2022

Commits on Jul 5, 2022

[cxx-interop] Add `CxxShim` library; move `__swift_interopStaticCast` into it.
zoecarver
committed

Commits on Jul 6, 2022

[cxx-interop] Disable cxxshim on windows until we can figure out cmakeconfig.
zoecarver
committed