docker: add common packages to debian base

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

tests/docker/dockerfiles/debian9.docker

@@ -18,8 +18,11 @@ RUN DEBIAN_FRONTEND=noninteractive apt install -yy eatmydata
 RUN DEBIAN_FRONTEND=noninteractive eatmydata \
     apt install -y --no-install-recommends \
         bison \
+        binutils-multiarch \
         build-essential \
         ca-certificates \
         clang \
         flex \
-        git
+        git \
+        pkg-config \
+        python-minimal