Docker: buildifier binary in image

docker/build/installers/install_qa_tools.sh

@@ -21,6 +21,18 @@ set -e
 
 cd "$(dirname "${BASH_SOURCE[0]}")"
 
+. /tmp/installers/installer_base.sh
+
+## buildifier ##
+PKG_NAME="buildifier"
+CHECKSUM="e92a6793c7134c5431c58fbc34700664f101e5c9b1c1fcd93b97978e8b7f88db"
+DOWNLOAD_LINK="https://github.com/bazelbuild/buildtools/releases/download/3.0.0/buildifier"
+download_if_not_cached "${PKG_NAME}" "${CHECKSUM}" "${DOWNLOAD_LINK}"
+
+chmod a+x ${PKG_NAME}
+cp ${PKG_NAME} /usr/local/bin/
+rm -rf ${PKG_NAME}
+
 apt-get -y update && \
     apt-get -y install \
     cppcheck \