image-builder: Add extra compression tools

Include some extra compression tools from the upstream Debos
dockerfile which may be useful.

Signed-off-by: Christopher Obbard <chris.obbard@collabora.com>

image-builder/Dockerfile

@@ -25,6 +25,7 @@ RUN apt-get update && \
         binfmt-support \
         bmap-tools \
         btrfs-progs \
+        bzip2 \
         ca-certificates \
         cryptsetup \
         curl \
@@ -47,6 +48,7 @@ RUN apt-get update && \
         ostree \
         ostree-push \
         parted \
+        pigz \
         procps \
         python3 \
         python3-debian \
@@ -54,8 +56,10 @@ RUN apt-get update && \
         qemu-user-static \
         rsync \
         user-mode-linux \
+        unzip \
         u-boot-tools \
-        udev
+        udev \
+        xz-utils
 
 # Defer libnss-unknown package installation to the end to avoid possible UID/GID problems
 RUN apt-get update  && \