Un-disable redefinition tests on JIT.

We no longer have any problems with racing JIT threads.

Test: ART_TEST_JIT=true mma -j40 test-art-host
Test: ./test/testrunner/testrunner.py --host --jit -j40
Change-Id: Ie88d0a891fbdd906641c0f7561406390db208b09
2 files changed