ephyr: Send RRCrtcChangeNotify events on resize

After resizing Xephyr's window RRGetCrtcInfo returns the changed size,
but the RRCrtcChangeNotify event is not sent.
Call RRGetInfo(pScreen, TRUE) to update the current mode and send
notifications to clients.
3 jobs for xephyr-crtc in 6 minutes and 25 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Docker Image
passed #238133
debian-testing

00:01:19

 
  Build And Test
passed #238134
autotools-build-and-test

00:05:06

passed #238135
meson-build-and-test

00:01:19