ntuple LD_LIBRARY_PATH
In Muse with spack, we are trying to avoid setting LD_LIBRARY_PATH. However, root expects to dynamically find and load dictionaries using this path. The solution here is to look for a flag "ROOT_NTUPLE" in the repo's .muse file. If there, Muse will add the libraries for this repo to the path. If Offline is also in the environment and built with Muse, then its libs will also be added to the path. This is necessary because some objects in TrkAna are defined in Offline.