vcs.rb: srcdir accessor

* tool/vcs.rb (VCS#srcdir): add accessor for VCS::GIT.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53479 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

tool/vcs.rb

@@ -89,6 +89,8 @@ class VCS
     String === path or path.respond_to?(:to_path)
   end
 
+  attr_reader :srcdir
+
   def initialize(path)
     @srcdir = path
     super()