Disable more tests that never finish on mips64

Author: Susurrus

test/sys/test_aio.rs

@@ -244,7 +244,7 @@ extern fn sigfunc(_: c_int) {
 // Test an aio operation with completion delivered by a signal
 // FIXME: This test is ignored on mips because of failures in qemu in CI
 #[test]
-#[cfg_attr(any(all(target_env = "musl", target_arch = "x86_64"), target_arch = "mips"), ignore)]
+#[cfg_attr(any(all(target_env = "musl", target_arch = "x86_64"), target_arch = "mips", target_arch = "mips64"), ignore)]
 fn test_write_sigev_signal() {
     let _ = SIGUSR2_MTX.lock().expect("Mutex got poisoned by another test");
     let sa = SigAction::new(SigHandler::Handler(sigfunc),