bug#27539: suggestion for download page

[lorenzo . adyns]

Hello,

I thought it could be helpful to point out that as of "windows 
10 Anniversary Update" it is possible to install "bash on ubuntu on 
windows"

explanation: https://msdn.microsoft.com/en-us/commandline/wsl/about

So it's possible to run the native Linux emacs within windows, maybe 
this could be a helpful addition to the windows download page

regards,
Lorenzo