Replace throw() with noexcept. Unlike throw(), noexcept indicates tha…

…t the function does not throw.

Before C++17, throw() was equivalent to wrapping the function in a try {} catch
{ std::unexpected(); }. In C++17 throw() was made equivalent to noexcept and
in C++20 throw() was removed.

lib/llvm-backend/cpp/object_loader.hh

@@ -192,7 +192,7 @@ void module_delete(WasmModule *module) { delete module; }
 
 bool invoke_trampoline(trampoline_t trampoline, void *ctx, void *func,
                        void *params, void *results, WasmTrap::Type *trap_out,
-                       box_any_t *user_error, void *invoke_env) throw() {
+                       box_any_t *user_error, void *invoke_env) noexcept {
   try {
     trampoline(ctx, func, params, results);
     return true;