egl: Make egl_dri2 and egl_glx built-in drivers.

These two drivers are small in size.  Making them built-in should
simplify packaging.
diff --git a/docs/egl.html b/docs/egl.html
index 33e9187..a92f9d1 100644
--- a/docs/egl.html
+++ b/docs/egl.html
@@ -148,9 +148,10 @@
 
 <li><code>EGL_DRIVER</code>
 
-<p>This variable specifies a full path to an EGL driver and it forces the
-specified EGL driver to be loaded.  It comes in handy when one wants to test a
-specific driver.  This variable is ignored for setuid/setgid binaries.</p>
+<p>This variable specifies a full path to or the name of an EGL driver.  It
+forces the specified EGL driver to be loaded.  It comes in handy when one wants
+to test a specific driver.  This variable is ignored for setuid/setgid
+binaries.</p>
 
 </li>