JIT mini-debug-info: Generate the debug info sooner.

We need to add the debug info before the entry-point is set,
otherwise there is window of time when we are missing it.

Test: test.py -b -r --optimizing --jit --host --64
Change-Id: I3bbad0c96d68e9603bac131faee498b8b9f62699
3 files changed