@compileLog should resolve lazy values

[daurnimator]

    const S = packed struct {_1: u1, x: u7, _: u24};
    @compileLog(@sizeOf(S));

Gives me

| (lazy value)

I can't see any reason for that value to be lazy: is there a way to force evaluation?

(Found while investigating #2627 (comment) )

[andrewrk]

I think @compileLog should force it.