gh-123 Windows cpack package is missing main dll

Regression in Issue-114 caused main dll to be excluded from package.
When WITH_DYNAMIC_MSVC_RUNTIME is false it included redundant MS runtime
libraries.

Fixes gh-123

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #124 from GordonSmith/gh-123

gh-123 Windows cpack package is missing main dll

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>