rb: Add ext/ to loadpath so BinaryProtocolAccelerated specs pass


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@680539 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/rb/spec/spec_helper.rb b/lib/rb/spec/spec_helper.rb
index 9d2dd0f..53d2b80 100644
--- a/lib/rb/spec/spec_helper.rb
+++ b/lib/rb/spec/spec_helper.rb
@@ -3,6 +3,8 @@
 gem 'rspec', '>= 1.1.4'
 require 'spec'
 
+$:.unshift File.join(File.dirname(__FILE__), *%w[.. ext])
+
 # pretend we already loaded fastthread, otherwise the nonblockingserver_spec
 # will get screwed up
 # $" << 'fastthread.bundle'