Revert "Revert "Try really hard for JIT in test 916""

We were looping forever waiting for the entrypoint to be switched
despite the JIT being disabled by the tracing instrumentation.

This reverts commit ca4feac9.

Reason for revert: Problem with ensureJitCompiled fixed

Test: ART_TEST_TRACE=true        \
      ART_TEST_OPTIMIZING=false  \
      ART_TEST_INTERPRETER=true  \
      ART_USE_READ_BARRIER=false \
      mma -j40 test-art-host-run-test-916-obsolete-jit

Change-Id: I11f1e3f6cf65f90509a1ba66625a7988f3d94af6