image-builder: Fix the fakemachine setup

The binfmt_misc module loading depends on kmod-static-nodes.service
running which depends on kmod, so install that.

On top of that, to mount the uml kernel modules on /lib/modules that
directory actually needs to exist so create it.

Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>

apertis-image-builder/Dockerfile

@@ -65,6 +65,7 @@ RUN apt-get update && \
         git \
         imx-code-signing-tool \
         jq \
+        kmod \
         libnss-wrapper \
         lqa \
         mtd-utils \
@@ -82,6 +83,10 @@ RUN apt-get update && \
         u-boot-tools \
         udev
 
+# Create /lib/modules as fakemachine will try to mount the uml modules at that
+# location
+RUN mkdir -p /lib/modules
+
 # FIXME: move to a packaged version
 RUN apt-get update  && \
     apt-get install --no-install-recommends -y busybox systemd-container debootstrap