[Buildroot] [PATCH 7/7] support/misc/gitlab-ci.yml.in: use python3 for flake8

[Titouan Christophe]

Hello,

On 12/08/20 16:29, Thomas Petazzoni wrote:
> The pkg-stats script now uses Python3 only constructs (the "async"
> keyword) and therefore fails to pass the Python2 flake8 test.
> 
> Let's use the Python3 flake8 instead.
> 
> Fixes:
> 
>    https://gitlab.com/buildroot.org/buildroot/-/jobs/681711009
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>

Reviewed-by: Titouan Christophe <titouan.christophe at railnova.eu>