Install bzip2 onto Linux CI Docker image

This used to be included already, but doesn't seem to be anymore.

Author: trflynn89

build/ci/Dockerfile

@@ -9,6 +9,7 @@ ARG JDK_VERSION
 # Install base tools
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y \
+        bzip2 \
         ccache \
         curl \
         git \