Follow-up to r1601496: Fix generation of zip files.

* tools/dist/dist.sh: Export po-update.sh separately so it doesn't have CRLF
    line endings which causes it to fail to run (shell tries to use the CR as
    part of the commands).  I could have just changed the eol-style on
    po-update.sh from native, but I suspect it would keep being changed back.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1601708 13f79535-47bb-0310-9956-ffa450edef68
Follow up to r1601708: Forgot to fix the paths after copying and pasting.

* tools/dist/dist.sh: Actually export po-update.sh and put it where I expected.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1601714 13f79535-47bb-0310-9956-ffa450edef68