installer/flash-all.sh: add sudo to run hisi-idt.py am: 0d92f2884f
am: f805586488

* commit 'f80558648818d357eb2af8a144796a42c6ce846c':
  installer/flash-all.sh: add sudo to run hisi-idt.py

Change-Id: I38fe6c5c5f7f401d1a3d6104f3dfaa2ec3869a35