Enable strict unwind check in gcstress.

This will take a little more time due to need to fetch the names.

It might also start revealing any rare corner cases in the JIT
ART-libunwindstack cross-process data-access synchronization.

There is reasonable chance we might need to revert this.

Test: art/test.py -b -r --jit --host --gcstress
Change-Id: I783d4f416ac8c13eb16217c91f9e1e004e48b6ae
1 file changed