gifn-apply: Ruff preview mode: SPDX, subprocess

Enable Ruff's preview mode.
Specify a regular expression to check for copyright notices that
will match our SPDX tags.
Override another "subprocess is insecure" warning.

Ruff: CPY001,S404
Change-Id: I47e11e6c8269b92e68ea51659a9e790d3ef9315e
3 files changed
tree: 9ba248d8e7795a403696c914621cd402fbfd10d2
  1. .gitreview
  2. patches/
  3. tools/