runsc: Make gofer logs show up in test output.

PiperOrigin-RevId: 200770591
Change-Id: Ifc096d88615b63135210d93c2b4cee2eaecf1eee

runsc/sandbox/sandbox.go

@@ -209,6 +209,8 @@ func (s *Sandbox) createGoferProcess(spec *specs.Spec, conf *boot.Config, bundle
 	}
 
 	cmd := exec.Command(binPath, args...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
 	cmd.ExtraFiles = goferEnds
 
 	// Setup any uid/gid mappings, and create or join the configured user