[ignition] Blacklist crashing test regress/regress-347914.

R=machenbach@chromium.org
TBR=rmcilroy@chromium.org

Review URL: https://codereview.chromium.org/1522343002 .

Cr-Commit-Position: refs/heads/master@{#32851}

test/mjsunit/mjsunit.status

@@ -874,6 +874,7 @@
   'regress/regress-331444': [SKIP],
   'regress/regress-343609': [SKIP],
   'regress/regress-347530': [SKIP],
+  'regress/regress-347914': [SKIP],
   'regress/regress-352982': [SKIP],
   'regress/regress-354357': [SKIP],
   'regress/regress-356053': [SKIP],