Since we don't ship the packages/ directory, only conditionally process the solaris pkginfo script as part of configure (it won't be available in release tarballs).
Since we don't ship the packages/ directory, only conditionally process
the solaris pkginfo script as part of configure (it won't be available in
release tarballs).

This fixes issue 3754.

* configure.ac:
  Check existence of packages/solaris/pkginfo before trying to process it.

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