Change any slashes in the "uname -m" output to underbars. HP machines

have slashes in the name, and a slash in the machine name, and thus the
name of a binary distribution, messes up binbuild.sh (among other things).


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@88529 13f79535-47bb-0310-9956-ffa450edef68