Check for the existance of files (rather than a directory) for the private packages:  DOT, NPSOL, and NLPQL.
Check for the existance of files (rather than a directory) for the
private packages:  DOT, NPSOL, and NLPQL.

Fixes the case where the CMake build is against a DAKOTA source tree
from an extracted distribution tarball (previous impl assumed SVN checkout).



git-svn-id: dcef21d3ff4cbd8dced82702dcaad637bf246ecc@313 aa0779c3-6ec2-4b84-a212-a405c134cd8d

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