docker: use eatmydata in debian arm64 image

Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NAlex Bennée <alex.bennee@linaro.org>
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>

tests/docker/dockerfiles/debian-arm64-cross.docker

@@ -8,8 +8,11 @@ FROM qemu:debian
 # Add the foreign architecture we want and install dependencies
 RUN dpkg --add-architecture arm64
 RUN apt update
-RUN apt install -yy crossbuild-essential-arm64
-RUN apt-get build-dep -yy -a arm64 qemu
+RUN DEBIAN_FRONTEND=noninteractive eatmydata \
+    apt-get install -y --no-install-recommends \
+        crossbuild-essential-arm64
+RUN DEBIAN_FRONTEND=noninteractive eatmydata \
+    apt-get build-dep -yy -a arm64 qemu
 
 # Specify the cross prefix for this image (see tests/docker/common.rc)
 ENV QEMU_CONFIGURE_OPTS --cross-prefix=aarch64-linux-gnu-