* configure.ac: Followup r1134219: Use 'cmp -s' instead of 'diff' to    detect changes to svn_private_config.h.  Take advantage of the fact    that cmp -s produces no output even if a file does not exist.    Use a temp variable to shorten the lines further.
* configure.ac: Followup r1134219: Use 'cmp -s' instead of 'diff' to
   detect changes to svn_private_config.h.  Take advantage of the fact
   that cmp -s produces no output even if a file does not exist.
   Use a temp variable to shorten the lines further.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion