Change file name of publish target manifest included in Microsoft.AspNetCore.All

[DamianEdwards]

The manifest file included in the Microsoft.AspNetCore.All that is used by default during publish doesn't currently have a descriptive name. The file name is displayed as part of the error message the dotnet host displays in the case an application is published using a manifest and then when run and can't find an assembly, so this name should be descriptive to make it easier for customers to determine the issue.

Let's rename them in accordance with the new component naming & versioning spec, e.g.: aspnetcore-store-2.0.0-preview1-final-win7-x64.xml