Try really hard for JIT in test 916

Sometimes we would fail to jit stuff due to high load. This makes us
try even harder to JIT so we won't fail in these scenarios.

Test: mma -j40 test-art-host
Test: stress --cpu 60 &; while ./test/run-test --host 916; do ; done

Change-Id: Ic944582bf021f119b8bc3f135af508ed8a8586c4