gifn-apply: README: add a brief note about the Tox invocation

Not nearly enough, but still a start.

Change-Id: I14608c80f04bc828bddbf69637403cb977d03f6f
1 file changed
tree: b64aa9d827739cd4a82dfb1e66119ec8b8830326
  1. .gitreview
  2. patches/
  3. tools/