fix github actions

.github/workflows/build.yml

@@ -96,11 +96,6 @@ jobs:
         run: |
           "$ANDROID_SDK_ROOT"/cmdline-tools/latest/bin/sdkmanager --sdk_root="$ANDROID_SDK_ROOT" "platform-tools" "build-tools;30.0.3" "platforms;android-29" "cmdline-tools;latest" "cmake;3.10.2.4988404" "ndk;21.4.7075529"
 
-          # TODO: Figure out why aarch64-linux-android-ar isn't already included.
-          wget 'https://github.com/urho3d/android-ndk/blob/5f984a348cdaab4c044922c7a154f48d183781bc/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-ar?raw=true' -O aarch64-linux-android-ar
-          chmod +x aarch64-linux-android-ar
-          mv aarch64-linux-android-ar /usr/local/lib/android/sdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin/
-
       - name: Set up Python
         uses: actions/setup-python@v2
 

src/my_node.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <godot_cpp/classes/node.hpp>
+#include <godot_cpp/core/class_db.hpp>
 
 using namespace godot;
 

src/my_singleton.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <godot_cpp/classes/object.hpp>
+#include <godot_cpp/core/class_db.hpp>
 
 using namespace godot;
 

src/register_types.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <godot_cpp/core/class_db.hpp>
+
 using namespace godot;
 
 void gdextension_initialize(ModuleInitializationLevel p_level);