Execution tests regress-336820 and regress-678917 finished with error
messages "allocation failure GC in old space requested" and "fatal
javascript OOM in CALL_AND_RETRY_LAST". For successful execution,
parameter max_old_space_size must be increased and this is done inside
tests.

TEST=mjsunit/regress/regress-336820,
     mjsunit/regress/regress-678917
BUG=

Review-Url: https://codereview.chromium.org/2907363003
Cr-Commit-Position: refs/heads/master@{#45672}