Compile mod_authn_core on Win32. (The authz-dev branch forgot to add this.)

* modules/aaa/mod_authn_core.dsp: New DSP file for mod_authn_core.
* Apache.dsw: Add mod_authn_core as a dependency.
* Makefile.win: Add install targets


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@490066 13f79535-47bb-0310-9956-ffa450edef68