Adds missing require 'rubygems' (#11051).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9742 e93f8b46-1217-0410-a6f0-8f06a7374b81

extra/svn/reposman.rb

@@ -3,6 +3,7 @@
 require 'optparse'
 require 'find'
 require 'etc'
+require 'rubygems'
 
 Version = "1.4"
 SUPPORTED_SCM = %w( Subversion Darcs Mercurial Bazaar Git Filesystem )