Fix issue #3258: 8lock.t fails in non-English locale.
Fix issue #3258: 8lock.t fails in non-English locale.

* subversion/bindings/swig/perl/native/t/8lock.t: Set C locale.

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