bug#46337: Attempt to fix the build

[Leo Famulari]

On Sun, May 30, 2021 at 07:54:33PM +0200, Sergey Trofimov wrote:
> 
> Hey there, it seems that qtwebengine build script just lacks the
> `-system-openh264` flag.
> In attempt to fix that I just slap the needed GN arg to the end of
> `src/buildtools/config/linux.pri`
> I've checked that the configure phase succeeds, but the full build takes too
> long on my machine.
> 
> Please find attached the proposed patch.
> 

> From 553a37f4af401f2a53575c0f2d77cb5030344f40 Mon Sep 17 00:00:00 2001
> From: Sergey Trofimov <sarg@sarg.org.ru>
> Date: Sun, 30 May 2021 14:39:15 +0200
> Subject: [PATCH] qtwebengine with openh264

Thanks! I wrote a commit message and pushed as
68dcdf6ea76cddc4f9e53aabe7c1a5724d5508b2