Add deopt fuzzer tool.

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index 50a4c7090f4b88fdce90232f6cbc427497e0a807..839aa3b8bc266efe4184343225d250ea4c8667f0 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -242,3 +242,22 @@ regress/regress-165637: SKIP
 
 # Skip long running test that times out in debug mode and goes OOM on NaCl.
 regress/regress-crbug-160010: SKIP
+
+##############################################################################
+[ $deopt_fuzzer == True ]
+
+# Skip tests that are not suitable for deoptimization fuzzing.
+assert-opt-and-deopt: SKIP
+never-optimize: SKIP
+regress/regress-2185-2: SKIP
+harmony/object-observe: SKIP
+readonly: SKIP
+array-feedback: SKIP
+
+# Deopt every n garbage collections collides with the deopt every n times flag.
+regress/regress-2653: SKIP
+
+# Issue 2795:
+array-store-and-grow: SKIP if $mode == debug
+
+