message: Fix build description
diff: @@ -31,7 +31,8 @@ if [ "${BITCOIN_GENBUILD_NO_GIT}" != "1" -a -e "$(which git 2>/dev/null)" -a "$(
  # if latest commit is tagged and not dirty, then override using the tag name
  RAWDESC=$(git describe --abbrev=0 2>/dev/null)
  if [ "$(git rev-parse HEAD)" = "$(git rev-list -1 $RAWDESC 2>/dev/null)" ]; then
  - git diff-index --quiet HEAD -- && DESC=$RAWDESC
  + git diff-index --quiet HEAD --
  + DESC=$RAWDESC
  fi
  # otherwise generate suffix from git, i.e. string like "59887e8-dirty"
  