message: include the new name for the cray auto detection type
  embree changed the cray isa autodetection type to DEFAULT. This
  change restores the old code path to what it was in that
  environment.
diff: @@ -56,7 +56,8 @@ macro(ospray_find_embree EMBREE_VERSION_REQUIRED)
  endmacro()
  macro(ospray_determine_embree_isa_support)
  - if (EMBREE_MAX_ISA STREQUAL "NONE")
  + if (EMBREE_MAX_ISA STREQUAL "DEFAULT" OR
  + EMBREE_MAX_ISA STREQUAL "NONE")
  set(EMBREE_ISA_SUPPORTS_SSE2 ${EMBREE_ISA_SSE2})
  set(EMBREE_ISA_SUPPORTS_SSE4 ${EMBREE_ISA_SSE42})
  set(EMBREE_ISA_SUPPORTS_AVX ${EMBREE_ISA_AVX})
  