ART: Pass current Thread* to Jit::ShouldUsePriorityThreadWeight().

And avoid some instructions from REFRESH_IBASE on x86-64.

Test: testrunner.py --host --interpreter --jit
Test: testrunner.py --target --interpreter --jit on Nexus 6P
Change-Id: Id42545d0d8fb8db0659b6c937ed7e8106d1dcfdb
17 files changed