message: kovan: update genesis file
diff: export L2_BLOCK_GAS_LIMIT=15000000
  export L2_CHAIN_ID=69
  export BLOCK_SIGNER_ADDRESS=0x27770a9694e4B4b1E130Ab91Bc327C36855f612E
  -export L1_STANDARD_BRIDGE_ADDRESS=
  +export L1_STANDARD_BRIDGE_ADDRESS=0xAa8023964a2DCe66D916C1c563468B5a186f2559
  export L1_FEE_WALLET_ADDRESS=0xB79f76EF2c5F0286176833E7B2eEe103b1CC3244
  -export L1_CROSS_DOMAIN_MESSENGER_ADDRESS=
  +export L1_CROSS_DOMAIN_MESSENGER_ADDRESS=0xC206AD2dc03306a82D06558B67d49AFBc10338c2
  export WHITELIST_OWNER=0x0000000000000000000000000000000000000000
  -export GAS_PRICE_ORACLE_OWNER=
  +export GAS_PRICE_ORACLE_OWNER=0x84f70449f90300997840eCb0918873745Ede7aE6
  yarn build:dump
  