Update to Boost probe to correctly handle --with-boost pointing to "source" layouts.
Update to Boost probe to correctly handle --with-boost pointing to
"source" layouts.


git-svn-id: c6750f7dd89925e309f580f56430152d063ff36c@157 aa0779c3-6ec2-4b84-a212-a405c134cd8d

pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA