Add missing energySpent to EVENT_BUILD data

[pkoziol]

Documentation says that EVENT_BUILD data should have energySpent property, but it doesn't (and because of that all my graphs are flat 😞).

[sparr]

EVENT_BUILD has since been updated to include the following:

            targetId: target._id,
            amount: boostedEffect,
            structureType: target.structureType,
            x: target.x,
            y: target.y,
            incomplete

energySpent is still in the docs (https://docs.screeps.com/api/#Room.getEventLog) and none of the new values are.