Use action for Android NDK

.github/workflows/main.yml

@@ -27,15 +27,10 @@ jobs:
       with:
         java-version: 8
 
-    - name: Set environment variables (Linux/macOS)
-      if: ${{ !startsWith(matrix.os, 'windows-') }}
+    - name: Install system dependencies (Linux)
+      if: ${{ startsWith(matrix.os, 'ubuntu-') }}
       run: |
-        echo "HXCPP_COMPILE_CACHE=~/.hxcpp" >> $GITHUB_ENV
-
-    - name: Set environment variables (Windows)
-      if: ${{ startsWith(matrix.os, 'windows-') }}
-      run: |
-        echo "HXCPP_COMPILE_CACHE=C:\.hxcpp" >> $GITHUB_ENV
+        sudo apt-get install -y libgl1-mesa-dev libglu1-mesa-dev g++-multilib gcc-multilib libasound2-dev libx11-dev libxext-dev libxi-dev libxrandr-dev libxinerama-dev
 
     - name: Install Haxe dependencies
       run: |
@@ -44,10 +39,15 @@ jobs:
         haxelib install hxp  --quiet
         haxelib git lime-samples https://github.com/openfl/lime-samples --quiet
 
-    - name: Install system dependencies (Linux)
-      if: ${{ startsWith(matrix.os, 'ubuntu-') }}
+    - name: Enable HXCPP compile cache (Linux/macOS)
+      if: ${{ !startsWith(matrix.os, 'windows-') }}
       run: |
-        sudo apt-get install -y libgl1-mesa-dev libglu1-mesa-dev g++-multilib gcc-multilib libasound2-dev libx11-dev libxext-dev libxi-dev libxrandr-dev libxinerama-dev
+        echo "HXCPP_COMPILE_CACHE=~/.hxcpp" >> $GITHUB_ENV
+
+    - name: Enable HXCPP compile cache (Windows)
+      if: ${{ startsWith(matrix.os, 'windows-') }}
+      run: |
+        echo "HXCPP_COMPILE_CACHE=C:\.hxcpp" >> $GITHUB_ENV
 
     - name: Install "lime" command alias (Linux/macOS)
       if: ${{ !startsWith(matrix.os, 'windows-') }}
@@ -64,12 +64,13 @@ jobs:
 
     - name: Configure Android support (Linux)
       if: ${{ startsWith(matrix.os, 'ubuntu-') }}
+      uses: nttld/setup-ndk@v1
+      id: configure-android
+      with:
+        ndk-version: r15c
       run: |
-        wget -O android-ndk.zip --quiet https://dl.google.com/android/repository/android-ndk-r15c-linux-x86_64.zip
-        unzip -qq android-ndk.zip
-        rm android-ndk.zip
         lime config ANDROID_SDK $ANDROID_HOME
-        lime config ANDROID_NDK_ROOT android-ndk-r15c
+        lime config ANDROID_NDK_ROOT ${{ steps.configure-android.outputs.ndk-path }}
         lime config JAVA_HOME $JAVA_HOME
         lime config ANDROID_SETUP true
         lime config