[PATCH] Dockerfile: Switch to gcc 9.2.0

[Bin Meng]

Hi Tom,

On Mon, Apr 6, 2020 at 8:36 PM Tom Rini <trini at konsulko.com> wrote:
>
> On Mon, Apr 06, 2020 at 05:33:00AM -0700, Bin Meng wrote:
>
> > Use gcc 9.2.0 to do the build testing.
> >
> > Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
>
> Oh nice.  Do we luck out and have no new warnings to fix?  Thanks!

Yep, looks there is only one build warning to fix.

The GCC 8 bug that caused the build failure for x86 codes is fixed in GCC 9.
https://lists.denx.de/pipermail/u-boot/2018-October/345925.html

So it's time to switch to a newer version compiler :)

Regards,
Bin