Updating BuildTools from 2.1.0-preview1-15669 to 2.1.0-preview1-15670
Updating BuildTools from 2.1.0-preview1-15669 to 2.1.0-preview1-15670

[auto-updated: buildtools]

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