i.e., recent 5745eccef54ddd3caca278d1d292a88b2281528b:
- Bump the function_type_mismatch handler version, as its signature has changed.
- The function_type_mismatch handler can return successfully now, so SanitizerKind::Function must be AlwaysRecoverable (like for SanitizerKind::Vptr).
- But the minimal runtime still unconditionally treats a call to the function_type_mismatch handler as failure, so document that. (An alternative would be to disallow -fsanitize=function in combination with -fsanitize-minimal-runtime, like it is done for -fsanitize=vptr.)
- Add tests.