CTS-201 WIP update viewer-external to run under linux

step 1 - minor cleanup that allows viewer to build under linux.
Will only run on aditi (crashes on agni), does not download meshes
successfully, and has pretty bad vertex corruption, but it runs!

Code reviewed by Falcon

 -Nyx

install.xml

@@ -1058,9 +1058,9 @@ anguage Infrstructure (CLI) international standard</string>
           <key>linux</key>
           <map>
             <key>md5sum</key>
-            <string>3427b3c31ed66132b19e1f6679894c57</string>
+            <string>33dee1d84d006a5339cf6ba4096b8bd9</string>
             <key>url</key>
-            <uri>scp:install-packages.lindenlab.com:/local/www/install-packages/doc/llconvexdecomposition-0.1-linux-20100628.tar.bz2</uri>
+            <uri>scp:install-packages.lindenlab.com:/local/www/install-packages/doc/llconvexdecomposition-0.1-linux-20100721.tar.bz2</uri>
           </map>
           <key>darwin</key>
           <map>