Add -DSHARED_MODULE when compiling modules to be shared (at least, when

Configure auto-creates a Makefile to build the module).

Submitted by:	Alexei


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@80109 13f79535-47bb-0310-9956-ffa450edef68