i#1565: set VERSION_NUMBER_PATCHLEVEL even on git log failure
i#1565: set VERSION_NUMBER_PATCHLEVEL even on git log failure

We try different ways to set VERSION_NUMBER_PATCHLEVEL on git log failure.

Review-URL: https://codereview.appspot.com/294130043

AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio