MSVC 2015 builds Failing After 2017 Support added

[David Ostrovsky]

On Sun, 2017-02-19 at 20:53 +0000, Luke Benes wrote:
> config_host.mk: 
> export UCRTSDKDIR=C:/PROGRA~2/WI3CF2~1/10/
> export UCRTVERSION=10.0.10240.0
> 
> Looking at the creation date of that folder, it matches the creation
>  date of C:\Program Files (x86)\Microsoft Visual Studio 14.0.  
> 
> So it seems that even if you do not install the win 10 SDK component,
> the MSVC 2015 installer will still create the "Windows Kits" folder
> and install some files. 

Thanks for the infos. I think I understand now what is going on:

* Install fresh VM
* Install MSVC 2013
* Istall SDK 8.x
* try compile latest master: works as expected
* Install MSVC 2015 *without* installing SDK 10
* try compile latest master: broken

Is that correct?