Fix SHARED_CORE rule: The CFLAGS_SHLIB variable is no longer doubled

(compilers complained) and the .so.V.R.P filename extension was adjusted to
correctly reflect the 1.3.2 version.

PR: 2644


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81796 13f79535-47bb-0310-9956-ffa450edef68