Use of the term stub library as a synonym for import library is potentially confusing. In your installation, you will have libiomp5stubs5md and mt libraries, which basically serialize the OpenMP calls (probably not what you are looking for).
The libiomp5md.dll is included in the redistributable library package which you can download from https://registrationcenter.intel.com if you have registered your license.
Mac OS X
libiomp5md.lib(dynamic import library)