[PATCH] build: prereq: drop support for Python 3.5

[Sven Roederer]

Hi,


Am Dienstag, 16. Februar 2021, 17:17:17 CEST schrieb Petr Štetiar:
> 
> > The meson build system bumped their python requirement to 3.6 for the
> > 0.57.0 release. This patch ensures that OpenWrt can update meson while
> > still relying on the host python.
> 
> Current buildbot images are based on Debian 9, which uses Python 3.5 so
> merging this would result in broken buildbots.
> 

On my Ubuntu 16.04 based build-system I also have build-failures for meson 
using Python3.5. They are triggered by the "mlog module" . Cherry-picking the 
recent meson updates into the packages feed fixing these errors, not sure if 
this is caused by the meson upgrade or the python-upgrade.

So it's indeed a tricky situation. But having the EOLed Python3.5 as minimum 
requirement for an upcoming release seems non optimal.

Sven