configure-svn-config.sh fails
https://codereview.chromium.org/13392007/

Reviewed by Eric Seidel.

This script was trying to use "svn checkout" to dowload a file from
svn.webkit.org, but "svn checkout" only works with directories.
Instead, we should use "svn export".

* EWSTools/configure-svn-config.sh:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147304 268f45cc-cd09-0410-ab3c-d52691b4dbfc