correct how the lib directory is used for the auto find utilities and the rest of the build system.

git-svn-id: http://osgworks.googlecode.com/svn/trunk@522 c67418bc-a6eb-11de-8ba5-91705c1537ed
Back out last change to this file by removing non-existing testboundingsphere.

git-svn-id: http://osgworks.googlecode.com/svn/trunk@523 c67418bc-a6eb-11de-8ba5-91705c1537ed