Fixed 3DS build, added 3DS CI

.github/workflows/ci-workflow.yml

@@ -2,6 +2,24 @@ name: Continuous integration
 on: [pull_request, push]
 
 jobs:
+  nintendo_3ds:
+    runs-on: ubuntu-latest
+    steps:
+      - run: wget https://github.com/devkitPro/pacman/releases/download/v1.0.2/devkitpro-pacman_1.0.2.amd64.deb -O /tmp/devkitpro-pacman.deb
+      - run: yes | sudo dpkg -i /tmp/devkitpro-pacman.deb
+      - run: yes | sudo dkp-pacman -Syu --needed devkitARM 3dstools libctru
+      - run: echo ::set-env name=DEVKITPRO::/opt/devkitpro
+      - run: echo ::set-env name=DEVKITARM::/opt/devkitpro/devkitARM
+      - run: echo ::set-env name=PATH::$DEVKITPRO/tools/bin:$DEVKITARM/bin:$PATH
+      
+      - uses: actions/checkout@v1
+        with:
+          submodules: true
+      - run: make -j2 PLATFORM=simulator TARGET=3ds
+      - uses: actions/upload-artifact@master
+        with:
+          name: epsilon-3ds.3dsx
+          path: output/release/simulator/3ds/epsilon.3dsx
   android:
     runs-on: ubuntu-latest
     steps: