updated CMakelist
updated CMakelist

amandalund/openmc,amandalund/openmc,mit-crpg/openmc,mit-crpg/openmc,johnnyliu27/openmc,walshjon/openmc,liangjg/openmc,shikhar413/openmc,mit-crpg/openmc,smharper/openmc,johnnyliu27/openmc,smharper/openmc,amandalund/openmc,johnnyliu27/openmc,shikhar413/openmc,amandalund/openmc,wbinventor/openmc,paulromano/openmc,wbinventor/openmc,liangjg/openmc,paulromano/openmc,wbinventor/openmc,liangjg/openmc,walshjon/openmc,shikhar413/openmc,wbinventor/openmc,shikhar413/openmc,paulromano/openmc,walshjon/openmc,johnnyliu27/openmc,mit-crpg/openmc,smharper/openmc,smharper/openmc,liangjg/openmc,walshjon/openmc,paulromano/openmc