all: update generated code (#15808)

* core/types, core/vm, eth, tests: regenerate gencodec files

* Makefile: update devtools target

Install protoc-gen-go and print reminders about npm, solc and protoc.
Also switch to github.com/kevinburke/go-bindata because it's more
maintained.

* contracts/ens: update contracts and regenerate with solidity v0.4.19

The newer upstream version of the FIFSRegistrar contract doesn't set the
resolver anymore. The resolver is now deployed separately.

* contracts/release: regenerate with solidity v0.4.19

* contracts/chequebook: fix fallback and regenerate with solidity v0.4.19

The contract didn't have a fallback function, payments would be rejected
when compiled with newer solidity. References to 'mortal' and 'owned'
use the local file system so we can compile without network access.

* p2p/discv5: regenerate with recent stringer

* cmd/faucet: regenerate

* dashboard: regenerate

* eth/tracers: regenerate

* internal/jsre/deps: regenerate

* dashboard: avoid sed -i because it's not portable

* accounts/usbwallet/internal/trezor: fix go generate warnings

tests/block_test_util.go

@@ -86,8 +86,8 @@ type btHeaderMarshaling struct {
 	ExtraData  hexutil.Bytes
 	Number     *math.HexOrDecimal256
 	Difficulty *math.HexOrDecimal256
-	GasLimit   *math.HexOrDecimal64
-	GasUsed    *math.HexOrDecimal64
+	GasLimit   math.HexOrDecimal64
+	GasUsed    math.HexOrDecimal64
 	Timestamp  *math.HexOrDecimal256
 }