function getFbtHash(
  text /*: string */,
  description /*: string */,
) /*: string */ {
  return tiger.hash(text + ':::' + description + ':');
}
Takes an fbt text and description and returns the unique identifier as calculated by
the FB version of tiger128 (old flipped-endian PHP version).

@example
  yarn fbt-collect --hash-module 'fb-tiger-hash/src/getFbtHash' ...