This resource /D syntax was pretty horridly imported into VS 2005,
  change the quotation to ensure a peaceful transition to sln/vcproj files.

Backports: 397647

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@397651 13f79535-47bb-0310-9956-ffa450edef68