Update AppVeyor: Shallow clone, more descriptive config
Update AppVeyor: Shallow clone, more descriptive config

felixrieseberg/xplat,Azure/deco,felixrieseberg/xplat,Pandacorn/deco,azure-storage/deco,azure-storage/deco,traceyt/xplat,traceyt/xplat,traceyt/xplat,Pandacorn/deco,Azure/deco,azure-storage/deco,felixrieseberg/xplat,Azure/deco,Pandacorn/deco