[mjsunit] Disable tests too memory hungry for tsan

Notry: true
Bug: v8:9179, v8:9180
Change-Id: I2f79bd6d4f2ad53d70955f2e22739b1b8873ae12
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1591598Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61198}

test/mjsunit/mjsunit.status

@@ -919,6 +919,10 @@
   # Slow on arm64 simulator: https://crbug.com/v8/7783
   'string-replace-gc': [PASS, ['arch == arm64 and simulator_run', SKIP]],
 
+  # Too memory hungry.
+  'regress/regress-779407': [PASS, ['tsan', SKIP]],
+  'regress/regress-599414-array-concat-fast-path':  [PASS, ['tsan', SKIP]],
+
   # Too memory hungry on Odroid devices.
   'regress/regress-678917': [PASS, ['arch == arm and not simulator_run', SKIP]],
 }],  # variant == stress