ref: Change TypeBuilder.Build() to return nothing.
ref: Change TypeBuilder.Build() to return nothing.

The previous bool return was a bit pointless, since the actual
error is retrieved via each pending type.

Change-Id: I8a58d9b73fe0968d4cf0de4855188f6c323f79b5
MultiPart: 2/2

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref