Using python-pip to pull cmake for assimp's dockerfile. Assimp requir…

…es cmake 3.22, but Ubuntu 20.04 apt-get only provides 3.16

Signed-off-by: Gene Walters <[email protected]>

package-system/assimp/Dockerfile

@@ -32,9 +32,13 @@ RUN apt-get install -y build-essential \
                        pkg-config \
                        libminizip-dev \
                        git \
-                       cmake \
                        ninja-build
 
+# Use python-pip to pull CMake. 
+# 20.04 Ubuntu apt-get comes with CMake 3.16, but Assimp requires CMake 3.22+
+RUN apt-get -y install python3-pip
+RUN pip install cmake --upgrade
+
 RUN apt upgrade -y
 
 # Prepare a target folder within the container to install the build artifacts tp