Changed macro for .rc in ap_release.h.

MingW32 windres issued a couple of warnings, and Watcom wrc broke with this
macro. This version tested with MingW32, Watcom, OpenWatcom, MSVC6, MSVC7,
and all can create now a *.res warning-free.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@983401 13f79535-47bb-0310-9956-ffa450edef68