Which trait makes disable device a class skill?

[Expostfacto]

Is there even one?

[Lawful Evil GM]

Wisdom in the flesh

[master_marshmallow]

Vagabond child.

[Damien_DM]

More specifically:

Criminal (Basic--Social) in Ultimate Campaign (not yet added to PFS Additional Resources).

Gold Finger (Campaign (Pathfinder Society, Qadira faction))--also grants +1 on Sleight of Hand.

Nimble Fingers, Keen Mind (Religion--Brigh)--in Faiths of Balance.

Vagabond Child (Regional--Urban)--in the Advanced Player's Guide and Ultimate Campaign.

Wisdom in the Flesh (Religion--Irori)--in the Advanced Player's Guide and Ultimate Campaign; this trait also has you use Wisdom in place of Strength or Dexterity for whichever skill you select it for.