[Temp][oz-wl] Fix crash when switching to console (VT) mode.

Buffer swapping should not be synchronized so that the GPU process
is not blocked by waiting for a frame update from Weston.

BUG=TC-341

[This is oz-wl's 0007-Fix-crash-when-switching-to-console-VT-mode.patch]

It is not clear from ozone-wayland's pull request #300 if this change
has been submitted upstream.

Author: Joone Hur

ui/gl/gl_context_egl.cc

@@ -120,6 +120,11 @@ bool GLContextEGL::MakeCurrent(GLSurface* surface) {
     return false;
   }
 
+#if defined(USE_OZONE)
+  if (!surface->IsOffscreen())
+    eglSwapInterval(display_, 0);
+#endif
+
   // Set this as soon as the context is current, since we might call into GL.
   SetRealGLApi();