Revert thunk emission code completely#686

Merged

kateinoigakukun merged 2 commits intoswiftwasm:swiftwasmfrom

kateinoigakukun:katei/revert-thin-to-thick

Apr 17, 2020

Commits on Apr 16, 2020

[WASM] Revert NeedsThunk patch for thin to thick
kateinoigakukun
committed
[WASM] Revert swift_willThrow patch and change to use swifterror
kateinoigakukun
committed