Translate error output from hook scripts from the native encoding to UTF8.
Translate error output from hook scripts from the native encoding to UTF8.

* subversion/libsvn_repos/hooks.c (run_hook_cmd): Convert error output to UTF8.

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