[Sheriff] Temporarily mark two mjsunit tests as flaky.

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index 4997753a9dc5cf49aab8a3af14dc3a3cc805a1fe..1e2fa62f1d0c28a475893119ac69b6798ccbec85 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -104,6 +104,11 @@
   # Tests verifying CHECK and ASSERT.
   'verify-check-false': [FAIL, NO_VARIANTS],
   'verify-assert-false': [NO_VARIANTS, ['mode == release', PASS], ['mode == debug', FAIL]],
+
+  # TODO(machenbach): Temporarily marked as flaky until there is infrastructure
+  # to disable these tests on GC stress.
+  'elements-kind': [PASS, ['mode == debug and system == linux', FLAKY]],
+  'osr-elements-kind': [PASS, ['mode == debug and system == linux', FLAKY]],
 }],  # ALWAYS
 
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