Update the svn-x64-centos scripts to match what's on the slave.

* tools/buildbot/slaves/svn-x64-centos/list-svn-deps.sh: New

* tools/buildbot/slaves/svn-x64-centos/svnbuild.sh: Update from slave.

* tools/buildbot/slaves/svn-x64-centos/svncheck.sh: Update from slave.

* tools/buildbot/slaves/svn-x64-centos/svnclean.sh: Update from slave.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1572782 13f79535-47bb-0310-9956-ffa450edef68