docs: update precompiled libs info

docs/precompiled.html

@@ -9,17 +9,11 @@
 <H1>Precompiled Libraries</H1>
 
 <p>
-In general, precompiled libraries are not available.
-However, people occasionally prepare packages of precompiled libraries
-for some systems.
+In general, precompiled Mesa libraries are not available.
 </p>
-
-<H2>Mesa-6.0 for Solaris</H2>
-
 <p>
-Steve Christensen has submitted precompiled Mesa-6.0 libraries for
-Solaris at <a href="http://sunfreeware.com/" target="_parent">
-sunfreeware.com</a>.
+However, some Linux distros (such as Ubuntu) seem to closely track
+Mesa and often have the latest Mesa release available as an update.
 </p>
 
 </BODY>