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

* commit '0d92f2884fc6a9559b2794354cfa711ec09c54a3':
  installer/flash-all.sh: add sudo to run hisi-idt.py

Change-Id: I96ab0587ffb8f561b90866ff370d98b4a9f0da4b