Add u-boot-tools to docker image.

In the case of the COMFILE PI which is a customized system
with a RPI Compute Module, we need to add some gpio commands
into the boot.scr.

Changelog: None

Signed-off-by: Drew Moseley <drew.moseley@northern.tech>

Dockerfile

@@ -42,6 +42,8 @@ RUN apt-get update && apt-get install -y \
     udev \
 # to create bmap index file (MENDER_USE_BMAP)
     bmap-tools \
+# to regenerate the U-Boot boot.scr on platforms that need customization
+    u-boot-tools \
 # needed to run pxz
     libgomp1
 

requirements-deb.txt

@@ -1 +1 @@
-binutils xz-utils file rsync parted e2fsprogs xfsprogs pigz dosfstools wget git make bmap-tools
+binutils xz-utils file rsync parted e2fsprogs xfsprogs pigz dosfstools wget git make bmap-tools u-boot-tools