Add libbox wrapper

experimental/libbox/pprof_stub.go

@@ -0,0 +1,21 @@
+//go:build !debug
+
+package libbox
+
+import (
+	"os"
+)
+
+type PProfServer struct{}
+
+func NewPProfServer(port int) *PProfServer {
+	return &PProfServer{}
+}
+
+func (s *PProfServer) Start() error {
+	return os.ErrInvalid
+}
+
+func (s *PProfServer) Close() error {
+	return os.ErrInvalid
+}