arm: Rewrite `art_quick_aput_obj`.

Test: run-gtests.sh
Test: testrunner.py --target --32 --optimizing
Test: testrunner.py --target --32 --optimizing --gcstress
Bug: 160737021
Change-Id: I32a51cee80dd33564481b9916967d6692c156d2e
2 files changed