add 15.8.7 data

Author: tglee

docs/install/visual-studio-build-numbers-and-release-dates.md

@@ -5,7 +5,7 @@ keywords:
 author: TerryGLee
 ms.author: tglee
 manager: douge
-ms.date: 10/02/2018
+ms.date: 10/10/2018
 ms.topic: reference
 helpviewer_keywords:
 ms.prod: visual-studio-dev15
@@ -19,6 +19,7 @@ The following table lists the build numbers and release dates for Visual Studio
 
 | **Version**| **Channel** | **Release date** | **Build version** |
 | ---------------------- | ----------- | ---------------- | ----------------- |
+| 15.8.7 | Release | October 10, 2018 | 15.8.28010.2046 |
 | 15.9.0 Preview 3 | Preview | October 2, 2018 | 15.9.28128.56 |
 | 15.8.6 | Release | October 2, 2018 | 15.8.28010.2041 |
 | 15.8.5 | Release | September 20, 2018 | 15.8.28010.2036 |