tests/functional: Mark another MIPS replay test as flaky

When disabling MIPS tests on commit 1c11aa1807
("tests/functional: Mark the MIPS replay tests as flaky")
we missed the 5KEc test.

Reported-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20251104145955.84091-1-philmd@linaro.org>

tests/functional/mips64el/test_replay.py

@@ -40,6 +40,7 @@ class Mips64elReplay(ReplayKernelBase):
         '75ba10cd35fb44e32948eeb26974f061b703c81c4ba2fab1ebcacf1d1bec3b61')
 
     @skipUntrustedTest()
+    @skipFlakyTest("https://gitlab.com/qemu-project/qemu/-/issues/2013")
     def test_replay_mips64el_malta_5KEc_cpio(self):
         self.set_machine('malta')
         self.cpu = '5KEc'