Bug#788425: [epiphany-browser] Empty white page is displayed instead of really rendered one

[Igor Bogomazov]

downgrading everything *-mesa helped:

[DOWNGRADE] libegl-mesa0:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libegl1-mesa:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libegl1-mesa-dev:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libgbm-dev:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libgbm1:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libgl1-mesa-dev:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libgl1-mesa-dri:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libgl1-mesa-glx:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libglapi-mesa:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libgles2-mesa:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libgles2-mesa-dev:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libglx-mesa0:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] libwayland-egl1-mesa:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] mesa-common-dev:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] mesa-utils:amd64 8.4.0-1 -> 8.3.0-3
[DOWNGRADE] mesa-va-drivers:amd64 18.2.5-2 -> 18.1.9-1
[DOWNGRADE] mesa-vdpau-drivers:amd64 18.2.5-2 -> 18.1.9-1