Modified Makefile for tests.
Modified Makefile for tests.

lilulu/openmc,mjlong/openmc,liangjg/openmc,amandalund/openmc,liangjg/openmc,mit-crpg/openmc,shikhar413/openmc,smharper/openmc,wbinventor/openmc,walshjon/openmc,wbinventor/openmc,samuelshaner/openmc,mit-crpg/openmc,liangjg/openmc,liangjg/openmc,paulromano/openmc,shikhar413/openmc,kellyrowland/openmc,mit-crpg/openmc,bhermanmit/openmc,johnnyliu27/openmc,paulromano/openmc,smharper/openmc,smharper/openmc,amandalund/openmc,walshjon/openmc,sxds/opemmc,amandalund/openmc,shikhar413/openmc,nhorelik/openmc,bhermanmit/cdash,wbinventor/openmc,mit-crpg/openmc,shenqicang/openmc,samuelshaner/openmc,shenqicang/openmc,lilulu/openmc,paulromano/openmc,keadyk/openmc_mg_prepush,lilulu/openmc,walshjon/openmc,shikhar413/openmc,nhorelik/openmc,paulromano/openmc,walshjon/openmc,johnnyliu27/openmc,johnnyliu27/openmc,mjlong/openmc,keadyk/openmc_mg_prepush,johnnyliu27/openmc,wbinventor/openmc,amandalund/openmc,samuelshaner/openmc,smharper/openmc,sxds/opemmc,samuelshaner/openmc,keadyk/openmc_mg_prepush,bhermanmit/openmc,kellyrowland/openmc