Fix typos and grammer in builder.py
Fix typos and grammer in builder.py

Change-Id: Ib87f4df8f741809840e92db9bacf2af847a5f77f
Closes-Bug: #1600403

notmyname/swift,notmyname/swift,swiftstack/swift,prashanthpai/swift,nadeemsyed/swift,tipabu/swift,notmyname/swift,matthewoliver/swift,smerritt/swift,swiftstack/swift,psachin/swift,hurricanerix/swift,nadeemsyed/swift,tipabu/swift,openstack/swift,clayg/swift,tipabu/swift,clayg/swift,psachin/swift,openstack/swift,matthewoliver/swift,matthewoliver/swift,nadeemsyed/swift,redbo/swift,smerritt/swift,hurricanerix/swift,redbo/swift,smerritt/swift,hurricanerix/swift,nadeemsyed/swift,swiftstack/swift,tipabu/swift,clayg/swift,notmyname/swift,prashanthpai/swift,clayg/swift,hurricanerix/swift,psachin/swift,smerritt/swift,matthewoliver/swift,openstack/swift,psachin/swift,openstack/swift