Updated Bootstrapper spec for MddBootstrapIntialize2(...options)

[DrusTheAxe]

Extend the API with support for initialization options

• Flat-C: Add enum MddBootstrapInitializeOptions
• Flat-C: Add MddBootstrapInitialize2() same as MddBootstrapInitialize() plus the options parameter
• C++: Add enum InitializeOptions
• C++: Add optional options parameter to Initialize*()
• C#: Add enum InitializeOptions
• C#: Add Initialize() and TryInitialize() overloads for optional options parameter