feat(boot): basic support for secure boot via shim protocol

src/drivers.rs

@@ -26,7 +26,7 @@ fn load_driver(context: Rc<SproutContext>, driver: &DriverDeclaration) -> Result
 
     // Resolve the path to the driver image.
     let resolved = utils::resolve_path(
-        context.root().loaded_image_path()?,
+        Some(context.root().loaded_image_path()?),
         &context.stamp(&driver.path),
     )
     .context("unable to resolve path to driver")?;