MB-100: toybuilder point to correct branches

- kvshard8
- abhinavdangeti ep-engine

Change-Id: I4766eb6a2cc6ce1c2d49cf39fa5ccc248b943f31
Reviewed-on: http://review.couchbase.org/26767
Reviewed-by: abhinav dangeti <abhinav.dangeti@gmail.com>
Tested-by: abhinav dangeti <abhinav.dangeti@gmail.com>