This ensures no eager bailout point is emitted after a comma expression
in test context where the right-hand side omitted an eager bailout point
as well. This is to stay in sync with full-codegen.

R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-624919
BUG=chromium:624919

Review-Url: https://codereview.chromium.org/2113893004
Cr-Commit-Position: refs/heads/master@{#37475}