SQLite Migrations: Autoincrement annotation not prefixed

[bricelam]

We currently generate the following for SQLite...

.Annotation("Autoincrement", true)

...and the following for SQL Server

.Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn)

IMHO, the first one should be Sqlite:Autoincrement. Unfortunately, we RTMed like this so we'll always have to support just Autoincrement, but we can change what we scaffold by default.

[bricelam]

Although MySQL also calls it AUTO_INCREMENT, so maybe it can just be a well-known, shared annotation.