Mark test-cpu-profiler/SampleWhenFrameIsNotSetup as flaky on MIPS simulator

test/cctest/cctest.status

Index: test/cctest/cctest.status
diff --git a/test/cctest/cctest.status b/test/cctest/cctest.status
index 6297f56555783a26294efa20e2340731a8333650..8ce11eb3904bf317d62c0085d7ea92b7ef67f830 100644
--- a/test/cctest/cctest.status
+++ b/test/cctest/cctest.status
@@ -73,6 +73,12 @@ test-serialize/DeserializeAndRunScript2: SKIP
 test-serialize/DeserializeFromSecondSerialization: SKIP
 
 ##############################################################################
+[ $arch == mipsel ]
+
+# BUG(2628): The test sometimes fails on MIPS simulator.
+test-cpu-profiler/SampleWhenFrameIsNotSetup: PASS || FAIL
+
+##############################################################################
 [ $arch == android_arm || $arch == android_ia32 ]
 
 # Tests crash as there is no /tmp directory in Android.