Update ccpp.yml

Author: dcwhite

.github/workflows/ccpp.yml

@@ -87,7 +87,7 @@ jobs:
       uses: actions/checkout@v2
 
     - name: Prepare
-      run: sudo apt-get update && sudo apt-get install mesa-common-dev libgl1-mesa-dev mesa-utils-extra libglapi-mesa ninja-build qt5-qmake qtbase5-dev libqt5opengl5-dev libqt5svg5-dev xrandr-dev
+      run: sudo apt-get update && sudo apt-get install mesa-common-dev libgl1-mesa-dev mesa-utils-extra libglapi-mesa ninja-build qt5-qmake qtbase5-dev libqt5opengl5-dev libqt5svg5-dev xorg-dev libglu1-mesa-dev
 
     - name: Build
       run: ./build.sh -DQt5_PATH=$(dpkg -L qtbase5-dev) -DUSER_PYTHON_VERSION="3.6.7" -DWITH_OSPRAY:BOOL=ON