Fix FILEOS tag in DLLs for cmake-based build.  (libaprutil.rc
needs WINNT defined.)

(not worth mentioning in CHANGES)


git-svn-id: https://svn.apache.org/repos/asf/apr/apr-util/branches/1.5.x@1559721 13f79535-47bb-0310-9956-ffa450edef68