xwayland: fix GL version check for GLES only devices
We currently bail out early for GLES only devices, and call epoxy_gl_version() too early for GLES only that will make GLES only devices return NULL for glGetString(GL_RENDERER).
Fixes: a506b4ec - xwayland: make context current to check GL version Signed-off-by: Tony Lindgren tony@atomide.com