cmake KOKKOS_COMPILER_HAS_AVX2 examples

trilinos/Trilinos packages/kokkos/cmake/kokkos_arch.cmake :768 

unset(KOKKOS_COMPILER_HAS_AVX2 CACHE)

trilinos/Trilinos packages/kokkos/cmake/kokkos_arch.cmake :769 

check_cxx_symbol_exists(__AVX2__ "" KOKKOS_COMPILER_HAS_AVX2)

trilinos/Trilinos packages/kokkos/cmake/kokkos_arch.cmake :787 

elseif(KOKKOS_COMPILER_HAS_AVX2)

kokkos/kokkos cmake/kokkos_arch.cmake :768 

unset(KOKKOS_COMPILER_HAS_AVX2 CACHE)

kokkos/kokkos cmake/kokkos_arch.cmake :769 

check_cxx_symbol_exists(__AVX2__ "" KOKKOS_COMPILER_HAS_AVX2)

kokkos/kokkos cmake/kokkos_arch.cmake :786 

elseif(KOKKOS_COMPILER_HAS_AVX2)