function updateWww (cordovaProject, destinations) {
    const sourceDirs = [
        path.relative(cordovaProject.root, cordovaProject.locations.www),
        path.relative(cordovaProject.root, destinations.platformWww)
    ];

    // If project contains 'merges' for our platform, use them as another overrides
    const merges_path = path.join(cordovaProject.root, 'merges', 'android');
    if (fs.existsSync(merges_path)) {
        events.emit('verbose', 'Found "merges/android" folder. Copying its contents into the android project.');
        sourceDirs.push(path.join('merges', 'android'));
    }

    const targetDir = path.relative(cordovaProject.root, destinations.www);
    events.emit(
        'verbose', 'Merging and updating files from [' + sourceDirs.join(', ') + '] to ' + targetDir);
    FileUpdater.mergeAndUpdateDir(
        sourceDirs, targetDir, { rootDir: cordovaProject.root }, logFileOp);
}
Updates platform 'www' directory by replacing it with contents of
  'platform_www' and app www. Also copies project's overrides' folder into
  the platform 'www' folder

@param   {Object}  cordovaProject    An object which describes cordova project.
@param   {Object}  destinations      An object that contains destination
  paths for www files.