message: fix(compiler-cli): suppress extraRequire errors in Closure Compiler
  This is needed to support
  because it will add an extra require on `tslib`.
  PR Close
diff: @@ -16,7 +16,7 @@ function getPreamble(original: string) {
  return `/**
  * @fileoverview This file was generated by the Angular template compiler. Do not edit.
  * ${original}
  - * @suppress {suspiciousCode,uselessCode,missingProperties,missingOverride,checkTypes}
  + * @suppress {suspiciousCode,uselessCode,missingProperties,missingOverride,checkTypes,extraRequire}
  * tslint:disable
  */`;
  }
  