Internal EVM calls SBAT emit events

[m-chrzan]

Expected Behavior

If the inflation factor gets updated when calling debitFrom to pay for a transaction fee with Celo Dollars, an InflationFactorUpdated event should be emitted.

Current Behavior

Haven't checked 100%, but from what I've seen, events from internal EVM calls are likely to be lost. So first step is to confirm this is actually a problem, but wanted to flag this.

[mrsmkl]

Tested by adding an event that is emitted every time debitFrom is called. It shows up in the receipts. Looks like events are added to statedb similarly to changes made into storage.

[mrsmkl]

If there is no associated transaction, the logs will then be gone...