Allow ffi_unwind_calls for arch::wasm32::throw

Author: purplesyringa

library/stdarch/crates/core_arch/src/wasm32/mod.rs

@@ -191,6 +191,7 @@ unsafe extern "C-unwind" {
 // #[cfg_attr(test, assert_instr(throw, TAG = 0, ptr = core::ptr::null_mut()))]
 #[inline]
 #[unstable(feature = "wasm_exception_handling_intrinsics", issue = "122465")]
+#[allow(ffi_unwind_calls)]
 pub unsafe fn throw<const TAG: i32>(ptr: *mut u8) -> ! {
     static_assert!(TAG == 0); // LLVM only supports tag 0 == C++ right now.
     wasm_throw(TAG, ptr)