Use ART defaults for libnative{bridge,loader} tests too.

Should fix mac builds.

Test: m
Test: mmma art/libnativebridge/ art/libnativeloader/
Test: Forrest build on sdk_mac on git_master-without-vendor
Bug: 143111454
Bug: 137364733
Bug: 133140750
Change-Id: I424399115af3a9b558d4b95e2f614807d66dbd23
2 files changed