Reduce array size in test 597-deopt-busy-loop/SimdLoop.

Let the test pass in GC-stress configurations.

Test: testrunner.py --host --gcstress -t 597-deopt-busy-loop
Bug: 138601207
Change-Id: I1f3ca293b17fcc94b437da6ff0b37f9ce1c64179
1 file changed