message: autogen.sh: minor fix wrt current working dir when running this script.
diff: #! /bin/bash
  set -ex
  +ROOTDIR="$(dirname $0)"
  BUILD_TYPE="${1:-Debug}"
  WORKDIR="build"
  if [[ "${BUILD_TYPE}" != "Debug" ]]; then
  WORKDIR="release"
  fi
  -ROOTDIR="$(pwd)"
  -mkdir -p "${WORKDIR}"
  -cd "${WORKDIR}"
  +mkdir -p "${ROOTDIR}/${WORKDIR}"
  +cd "${ROOTDIR}/${WORKDIR}"
  exec cmake "${ROOTDIR}" \
  -DCMAKE_BUILD_TYPE="${BUILD_TYPE}" \
  