增加eth-lib对本地account的支持

patches/eth-lib+0.2.8.patch

@@ -0,0 +1,18 @@
+diff --git a/node_modules/eth-lib/lib/account.js b/node_modules/eth-lib/lib/account.js
+index 5d5fc82..bc7b6cd 100644
+--- a/node_modules/eth-lib/lib/account.js
++++ b/node_modules/eth-lib/lib/account.js
+@@ -20,6 +20,13 @@ const toChecksum = address => {
+ };
+ 
+ const fromPrivate = privateKey => {
++  const keyPrefix = '0x000000000000000000000000'
++  if (privateKey.startsWith(keyPrefix)) {
++    return {
++      address: privateKey.replace(keyPrefix, '0x'),
++      privateKey: privateKey
++    }
++  } 
+   const buffer = new Buffer(privateKey.slice(2), "hex");
+   const ecKey = secp256k1.keyFromPrivate(buffer);
+   const publicKey = "0x" + ecKey.getPublic(false, 'hex').slice(2);