[test] Skip rest-params test.

BUG=chromium:508074
LOG=n
NOTREECHECKS=true
NOTRY=true
TBR=ishell@chromium.org

Review URL: https://codereview.chromium.org/1215023016

Cr-Commit-Position: refs/heads/master@{#29537}

test/mjsunit/mjsunit.status

@@ -247,6 +247,7 @@
 
   # BUG(chromium:508074). Remove this once the issue is fixed.
   'harmony/arrow-rest-params': [PASS, NO_VARIANTS],
+  'harmony/rest-params': [PASS, ['no_snap == True', NO_VARIANTS]],
 }],  # ALWAYS
 
 ['novfp3 == True', {