Added binbuild.sh and findprg.sh helpers to make it easier for us

to build binary distributions.  This is Lars' "take 2" version of 12/26.

Submitted by:	Lars Eilebrecht
Reviewed by:	Roy Fielding, Randy Terbush


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@82599 13f79535-47bb-0310-9956-ffa450edef68