Fix CMake issues per Paul R fixes
Fix CMake issues per Paul R fixes

amandalund/openmc,amandalund/openmc,shikhar413/openmc,shikhar413/openmc,amandalund/openmc,amandalund/openmc,paulromano/openmc,walshjon/openmc,liangjg/openmc,liangjg/openmc,walshjon/openmc,mit-crpg/openmc,walshjon/openmc,mit-crpg/openmc,smharper/openmc,shikhar413/openmc,mit-crpg/openmc,paulromano/openmc,smharper/openmc,mit-crpg/openmc,smharper/openmc,liangjg/openmc,liangjg/openmc,shikhar413/openmc,paulromano/openmc,paulromano/openmc,smharper/openmc,walshjon/openmc