fix(build): disable the analysis of third-party libs

Author: vsavkin

tools/build/dartanalyzer.js

@@ -20,7 +20,7 @@ module.exports = function(gulp, plugins, config) {
  }));
  var analyzeFile = ['library _analyzer;'];
  srcFiles.concat(testFiles).forEach(function(fileName, index) {
- if (fileName !== tempFile) {
+ if (fileName !== tempFile && fileName.indexOf("/packages/") === -1) {
  analyzeFile.push('import "./'+fileName+'" as mod'+index+';');
  }
  });