[geant4] Add missing newline at EOF to prevent patch complaints

Author: greenc-FNAL

var/spack/repos/builtin/packages/geant4/package-cache.patch

@@ -45,4 +45,4 @@ index 7b3a1f9836..f503a2994a 100644
 +    geant4_save_package_variables(EXPAT EXPAT_INCLUDE_DIR EXPAT_LIBRARY EXPAT_LIBRARY_RELEASE EXPAT_LIBRARY_DEBUG)
    else()
      set(EXPAT_FOUND TRUE)
-     set(GEANT4_USE_BUILTIN_EXPAT TRUE)
+     set(GEANT4_USE_BUILTIN_EXPAT TRUE)