ART: Enable scalar loop peeling and unrolling.

Turn on scalar loop peeling and unrolling by default.

Test: 482-checker-loop-back-edge-use, 530-checker-peel-unroll
Test: test-art-host, test-art-target, boot-to-gui
Change-Id: Ibfe1b54f790a97b281e85396da2985e0f22c2834
8 files changed