ubuntu-distro: Add dfu-util package

- TI SDK provides a flash writer script which will use USB DFU to boot the board and then flash the binaries to on-board memory [1]. 

- This tool also supports flashing multiple boards via dfu-util simultaneously. Hence, add dfu-util package in ubuntu-distro docker image.

[1]: https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/09_01_00_08/exports/docs/linux/Foundational_Components/Tools/Flash_via_DFU.html

Signed-off-by: Chirag Shilwant <c-shilwant@ti.com>

ubuntu-distro/Dockerfile

@@ -3,7 +3,7 @@ FROM amd64/ubuntu:22.04
 
 # Installing packages needed for Yocto & SDK Makefile builds
 RUN export DEBIAN_FRONTEND=noninteractive; apt-get update && \
-         apt-get install -y --no-install-recommends file autoconf automake iproute2 usbutils dialog \
+         apt-get install -y --no-install-recommends file autoconf automake iproute2 usbutils dialog dfu-util \
          bison flex libssl-dev bc u-boot-tools swig wget device-tree-compiler python3 python3-pip python3-dev dosfstools fdisk sudo && \
          pip3 install jsonschema pyelftools PyYAML Mako && \