simple-egl: Add a default cursor

If clients don't set a cursor, they get whatever the last cursor was
before the pointer entered their window.  That's a little confusing, so
set a pointer on enter to avoid that.  The down-side is that simple EGL
isn't very simple anymore.

https://bugs.freedesktop.org/show_bug.cgi?id=52452
diff --git a/configure.ac b/configure.ac
index 552c050..35a8097 100644
--- a/configure.ac
+++ b/configure.ac
@@ -167,7 +167,7 @@
 AM_CONDITIONAL(BUILD_SIMPLE_EGL_CLIENTS, test "x$enable_simple_egl_clients" = "xyes")
 if test x$enable_simple_egl_clients = xyes; then
   PKG_CHECK_MODULES(SIMPLE_EGL_CLIENT,
-                    [egl >= 7.10 glesv2 wayland-client wayland-egl])
+                    [egl >= 7.10 glesv2 wayland-client wayland-egl wayland-cursor])
 fi
 
 AC_ARG_ENABLE(clients, [  --enable-clients],, enable_clients=yes)