st/egl_g3d: Rename to st/egl.

Simply the name to egl.
diff --git a/docs/opengles.html b/docs/opengles.html
index a871e85..fc41e67 100644
--- a/docs/opengles.html
+++ b/docs/opengles.html
@@ -20,7 +20,7 @@
 
 <h2>Build the Libraries</h2>
 <ol>
-<li>Run <code>configure</code> with <code>--with-state-trackers=egl_g3d,es</code> and enable the Gallium driver for your hardware.</li>
+<li>Run <code>configure</code> with <code>--with-state-trackers=egl,es</code> and enable the Gallium driver for your hardware.</li>
 <li>Build and install Mesa as usual.</li>
 </ol>