CI: Add flex and bison tools to Docker container

We will be needing these for OpenHarmony 3.1 builds.

Signed-off-by: Esben Haabendal <esben.haabendal@huawei.com>

.gitlab-ci/container.yml

@@ -14,7 +14,7 @@
 # limitations under the License.
 
 variables:
-  BITBAKE_CONTAINER_VERSION: "0.5"
+  BITBAKE_CONTAINER_VERSION: "0.6"
 
 .kaniko:
   stage: container

.gitlab-ci/container/bitbake-builder/Dockerfile

@@ -28,6 +28,7 @@ COPY --chown=root:root ppa/zyga-ubuntu-oh-tools.gpg /etc/apt/trusted.gpg.d/
 RUN eatmydata apt-get update -qq \
  && eatmydata apt-get install -qq -y \
         bash git-repo apt-utils build-essential chrpath cpio diffstat gawk git sudo wget \
+        flex bison \
         language-pack-en-base time locales python-is-python3 python3-distutils libssl-dev \
         iproute2 iputils-ping curl jq ca-certificates git-lfs \
         lz4 zstd git-restore-mtime \