add __dynamic_loader into targetsbuild for nintendo switch

_demo/targetsbuild/C/c.go

@@ -11,3 +11,11 @@ func Reset_Handler() {
 func XhandleInterrupt() {
 
 }
+
+type dyn64 struct {
+	// Fields for dynamic loader
+}
+
+// For nintendo switch
+func X__dynamic_loader(base uintptr, dyn *dyn64) {
+}