tests: skip the nios2 replay_kernel test

It is buggy and keeps failing.

Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230228190653.1602033-10-alex.bennee@linaro.org>
diff --git a/tests/avocado/replay_kernel.py b/tests/avocado/replay_kernel.py
index 00a26e4..f13456e 100644
--- a/tests/avocado/replay_kernel.py
+++ b/tests/avocado/replay_kernel.py
@@ -349,6 +349,7 @@
         file_path = self.fetch_asset(tar_url, asset_hash=tar_hash)
         self.do_test_advcal_2018(file_path, 'vmlinux')
 
+    @skip("nios2 emulation is buggy under record/replay")
     def test_nios2_10m50(self):
         """
         :avocado: tags=arch:nios2