Add conservative ticks around more egrep arguments in top-level configure

to avoid problems under brain-dead platforms like Digital Unix (OSF1).

PR: 2596
PS: The error on OSF1 also could mean that OSF1 really wants "egrep -e
    <pattern>" instead of "egrep <pattern>". But when this is the problem
    other egreps in src/Configure also would fail. Because they don't we can
    assume that the problem for OSF1 is really the missing quotes because of
    the ^ char.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81710 13f79535-47bb-0310-9956-ffa450edef68