Build errors in src/support stop with an error, just like all the

other recursive make calls.

Submitted by: David Harris <dharris@drh.net>
Reviewed by:  Martin Kraemer


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83725 13f79535-47bb-0310-9956-ffa450edef68