CORE-12: Update BREthereumTokens from IOS tokens.json.
CORE-12: Update BREthereumTokens from IOS tokens.json.

breadwallet/breadwallet-core,breadwallet/breadwallet-core,breadwallet/breadwallet-core,breadwallet/breadwallet-core,breadwallet/breadwallet-core,breadwallet/breadwallet-core