Update blobs.yml to include postgres-9.4.6
Update blobs.yml to include postgres-9.4.6

[#114884951](https://www.pivotaltracker.com/story/show/114884951)

Signed-off-by: William Lindner <07e881a60bf9e51606643ece30b1d2ad0de68928@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh