Updating BuildTools from 2.1.3-rtm-15815 to 2.1.3-rtm-15816
Updating BuildTools from 2.1.3-rtm-15815 to 2.1.3-rtm-15816

[auto-updated: buildtools]

aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore