Update How-to-Contribute.md

1. Document that WSL built / run of VSCode is not
   functional
2. Provide link to a master issue in the WSL
   repository where the behavior that inhibits
   Node thus Electron, thus VSCode, can be tracked
   for those who believe they can get it working

How-to-Contribute.md

@@ -26,6 +26,8 @@ git clone https://github.com/Microsoft/vscode.git
     - Set a `PYTHON` environment variable pointing to your `python.exe`. Eg: `C:\Python27\python.exe`
     - [Visual Studio 2013 for Windows Desktop](https://www.visualstudio.com/en-us/news/vs2013-community-vs.aspx?wt.mc_id=github_microsoft_vscode) or [Visual Studio 2015](https://www.visualstudio.com/en-us/products/visual-studio-community-vs.aspx?wt.mc_id=github_microsoft_vscode), make sure to select the option to install all C++ tools and the Windows SDK.
     - You can also use Felix Rieseberg's [Windows Build Tools npm module](https://github.com/felixrieseberg/windows-build-tools) instead of Visual Studio
+  - **Windows Linux Subsystem (WSL)**
+    - *This platform is not currently supported. Merely re-implementing install steps for Linux **will not be successful**. The blocking issues are being tracked in https://github.com/Microsoft/WSL/issues/2293*
   - **OS X**
     - [Xcode](https://developer.apple.com/xcode/downloads/) and the Command Line Tools (Xcode -> Preferences -> Downloads), which will install `gcc` and the related toolchain containing `make`
   - **Linux**
@@ -152,4 +154,4 @@ We appreciate your localization contributions, either by providing new translati
 
 ## Discussion Etiquette
 
-In order to keep the conversation clear and transparent, please limit discussion to English and keep things on topic with the issue. Be considerate to others and try to be courteous and professional at all times.
+In order to keep the conversation clear and transparent, please limit discussion to English and keep things on topic with the issue. Be considerate to others and try to be courteous and professional at all times.