Zhengbo Li 182bc774b5 Add diagnostics to remind adding tsconfig file for certain external project (#11932)
* Add diagnostics for certain external project

* Show tsconfig suggestion

* fix lint error

* Address pr

* fix comment

* Update error message
2016-11-01 16:42:06 -07:00
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2016-10-28 16:41:17 -07:00