swift

36922aac - [TBD] Pass decl ref when adding AFP symbols.

[TBD] Pass decl ref when adding AFP symbols. Previously, adding a symbol for an async function pointer to the TBD entailed passing an AbstractFunctionDecl to TBDGenVisitor::addAsyncFunctionPointerSymbol. That arrangment limited clients from specifying a different SILDeclRef::Kind than the one which could be inferred from the type of the decl which was passed to the visitor's function. In particular, it prevented clients from specifying that the symbol for an initializer corresponding to a ConstructorDecl should be added to the TBD. Here, the arrangement is changed so that the visitor's function takes a SILDeclRef.