CI: Include qtbase5-private-dev package

Author: stenzek

.github/workflows/rolling-release.yml

@@ -50,7 +50,7 @@ jobs:
       shell: bash
       run: |
         sudo apt-get update
-        sudo apt-get -y install cmake ninja-build ccache libsdl2-dev libgtk2.0-dev qtbase5-dev qtbase5-dev-tools qt5-default
+        sudo apt-get -y install cmake ninja-build ccache libsdl2-dev libgtk2.0-dev qtbase5-dev qtbase5-dev-tools qtbase5-private-dev qt5-default
 
     - name: Compile build
       shell: bash

appveyor.yml

@@ -18,7 +18,7 @@ install:
 
       sudo apt-get update
 
-      sudo apt-get install -y cmake ninja-build ccache libsdl2-dev libgtk2.0-dev qtbase5-dev qtbase5-dev-tools qt5-default
+      sudo apt-get install -y cmake ninja-build ccache libsdl2-dev libgtk2.0-dev qtbase5-dev qtbase5-dev-tools qtbase5-private-dev qt5-default
 
     elif [ "$APPVEYOR_BUILD_WORKER_IMAGE" == "macOS" ]; then