core, eth: unship EIP 2315

# Conflicts:
#	core/vm/contract.go
#	core/vm/gen_structlog.go
#	core/vm/instructions.go
#	core/vm/instructions_test.go
#	core/vm/interpreter.go
#	core/vm/logger.go
#	core/vm/logger_json.go
#	core/vm/logger_test.go
#	core/vm/stack/stack.go
#	eth/tracers/tracer.go
#	eth/tracers/tracer_test.go