ci: add buildroot dependencies to install list

This updates the environment to include all required Buildroot
packages to prevent missing dependency errors during builds.

Fixes: #3029
Signed-off-by: Ozan Durgut <ozan.durgut@analog.com>

Author: ozan956

container/Containerfile

@@ -26,6 +26,8 @@ COPY install-compilers.sh .
 RUN chmod +x install-compilers.sh ; ./install-compilers.sh
 COPY install-extra.sh .
 RUN chmod +x install-extra.sh ; ./install-extra.sh
+COPY install-buildroot.sh .
+RUN chmod +x install-buildroot.sh ; ./install-buildroot.sh
 
 RUN mkdir -p /usr/local/bin
 WORKDIR /usr/local/bin

container/install-buildroot.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+# for: build-doc-*
+
+set -e
+
+# Install packages required by Buildroot
+zypper install -y --no-recommends \
+    gcc gcc-c++ make \
+    glibc-devel libstdc++-devel binutils rpm-build \
+    git bc unzip file rsync \
+    cpio wget python3 python3-pip