Update script to include mkimage with container

fsl-imx-wayland_5.10-hardknott/Dockerfile

@@ -39,4 +39,7 @@ RUN echo '. /opt/fsl-imx-wayland/5.10-hardknott/environment-setup-cortexa53-cryp
 # Add user
 RUN useradd -ms /bin/bash dev
 USER dev
-WORKDIR /home/dev
\ No newline at end of file
+WORKDIR /home/dev
+
+# Clone imx-mkimage as user inside the container
+RUN git clone https://git.seco.com/seco-ne/3rd-party/kuk/imx-mkimage-kuk.git -b kuk_lf-5.10.52_2.1.0 /home/dev/imx-mkimage