Fix some spelling oopses.
Fix some spelling oopses.

* subversion/tests/cmdline/svnsync_tests.py
  s/syncron/synchron/

Found by: glasser

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