Catch block mismatch in Config.js

[ericwlange]

In Config.js:

  try {
    fs.writeFileSync(local_path + 'react-native/node_modules/metro/src/node-haste/Package.js',
      fs.readFileSync(path.resolve(__dirname, 'metro-polyfill/Package.js'))
    );
  } catch (e) {}
  fs.writeFileSync(local_path + 'metro/src/node-haste/Package.js',
    fs.readFileSync(path.resolve(__dirname, 'metro-polyfill/Package.js'))
  );

and

  try {
    fs.writeFileSync(local_path + 'react-native/node_modules/metro/src/defaults.js',
      fs.readFileSync(path.resolve(__dirname, 'metro-polyfill/defaults.js'))
    );
  } catch (e) {
    fs.writeFileSync(local_path + 'metro/src/defaults.js',
      fs.readFileSync(path.resolve(__dirname, 'metro-polyfill/defaults.js'))
    );
  }

handle the catch blocks differently. They should both be like the first.