Disallow input file write access to jdigen.py am: 091ceb2bb2 am: e638766f63 am: 8352906c00 am: 5f746c0bdf am: 2914c624fd am: f62739495a

Original change: https://android-review.googlesource.com/c/platform/external/oj-libjdwp/+/1351023

Change-Id: I816c205894a9d11e154649a9bc3ccb9eba0ce58e