GLX: Note the GLXVND version requirement for setClientScreenVendor.

Add a note to the comment for GlxServerExports::setClientScreenVendor that it
was added in GLXVND version 0.1.
3 jobs for GLXVND-per-client-vendor in 5 minutes and 37 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Docker Image
passed #299110
debian-testing

00:00:29

 
  Build And Test
passed #299111
autotools-build-and-test

00:05:08

passed #299112
meson-build-and-test

00:01:21