Add libGL fix for Ubuntu 10.10

Change-Id: I33c8cc100880b2f75c6ab9a6a3eda8d6eb354d44
diff --git a/src/source/initializing.md b/src/source/initializing.md
index 87d7079..f73a433 100644
--- a/src/source/initializing.md
+++ b/src/source/initializing.md
@@ -75,7 +75,11 @@
       libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown \
       libxml2-utils
 
-On newer versions of Ubuntu such as 11.10 you may need to do the following:
+On Ubuntu 10.10:
+
+    $ sudo ln -s /usr/lib32/mesa/libGL.so.1 /usr/lib32/mesa/libGL.so
+
+On Ubuntu 11.10:
 
     $ sudo ln -s /usr/lib/i386-linux-gnu/libX11.so.6 /usr/lib/i386-linux-gnu/libX11.so