Fix the Ruby bindings test failures caused in r20336.
Fix the Ruby bindings test failures caused in r20336.

* subversion/bindings/swig/ruby/svn/error.rb:
  Ignore SVN_ERR_*_CATEGORY_START.

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