waylandsink: Workaround gnome-shell bug

Use a timeout to limit that amount of time we wait after the compositor
for the initial configure event. Compositor are support to emit a
configure event before any wl_buffer can be attached. The problem is
that Weston strongly enforce this, while gnome-shell simply does not
emit such an event.
15 jobs for waylandsink-gnome-shell-workaround in 58 minutes and 17 seconds (queued for 9 minutes and 48 seconds)
Status Job ID Name Coverage
  Preparation
passed #319400
gst indent

00:00:19

passed #319399
manifest

00:00:29

 
  Build
passed #319402
build fedora x86_64

00:06:19

passed #319404
build nodebug fedora x86_64

00:04:31

 
  Test
passed #319406
check fedora

00:03:33

passed #319408
integration testsuites fedora

00:10:01

 
  Full Builds
passed #319412
build cerbero android universal

00:08:24

passed #319414
build cerbero cross win32

00:05:30

passed #319417
build cerbero cross win64

00:05:04

passed #320286
build cerbero fedora x86_64

00:06:01

failed #319896
build cerbero fedora x86_64

00:01:39

failed #319411
build cerbero fedora x86_64

00:03:13

 
  Full Tests
passed #319419
valgrind bad

00:09:37

 
  Apps
passed #319420
android universal examples

00:05:15

 
  Deploy
passed #319421
documentation

00:01:49