core/vm: move Log to core/types

This significantly reduces the dependency closure of ethclient, which no
longer depends on core/vm as of this change.

All uses of vm.Logs are replaced by []*types.Log. NewLog is gone too,
the constructor simply returned a literal.

core/blockchain.go

@@ -883,7 +883,7 @@ func (self *BlockChain) InsertChain(chain types.Blocks) (int, error) {
 	var (
 		stats         = insertStats{startTime: time.Now()}
 		events        = make([]interface{}, 0, len(chain))
-		coalescedLogs vm.Logs
+		coalescedLogs []*types.Log
 		nonceChecked  = make([]bool, len(chain))
 	)
 
@@ -1094,7 +1094,7 @@ func (self *BlockChain) reorg(oldBlock, newBlock *types.Block) error {
 		oldStart    = oldBlock
 		newStart    = newBlock
 		deletedTxs  types.Transactions
-		deletedLogs vm.Logs
+		deletedLogs []*types.Log
 		// collectLogs collects the logs that were generated during the
 		// processing of the block that corresponds with the given hash.
 		// These logs are later announced as deleted.
@@ -1210,7 +1210,7 @@ func (self *BlockChain) reorg(oldBlock, newBlock *types.Block) error {
 
 // postChainEvents iterates over the events generated by a chain insertion and
 // posts them into the event mux.
-func (self *BlockChain) postChainEvents(events []interface{}, logs vm.Logs) {
+func (self *BlockChain) postChainEvents(events []interface{}, logs []*types.Log) {
 	// post event logs for further processing
 	self.eventMux.Post(logs)
 	for _, event := range events {