fix giblab start error, log is : Errno::EACCES: Permission denied - conn...

error log:

== Seed from /home/git/gitlab/db/fixtures/production/001_admin.rb
2014-11-08T15:52:20Z 25461 TID-otwilgzbo INFO: Sidekiq client with redis options {:url=>"unix:/var/run/redis/redis.sock", :namespace=>"resque:gitlab"}
rake aborted!

Errno::EACCES: Permission denied - connect(2) for /var/run/redis/redis.sock