all: fix spelling errors

build/update-license.go

cmd/swarm/main.go

console/bridge.go

console/prompter.go

contracts/chequebook/cheque.go

contracts/release/contract.sol

core/state/statedb.go

core/tx_list.go

core/tx_pool.go

core/vm/environment.go

crypto/crypto.go

crypto/ecies/ecies.go

crypto/secp256k1/libsecp256k1/include/secp256k1_schnorr.h

crypto/secp256k1/notes.go

crypto/secp256k1/secp256.go

eth/api.go

eth/downloader/downloader.go

eth/filters/filter_system.go

eth/filters/filter_system_test.go

eth/handler_test.go