cmake Libint2 examples

psi4/psi4 external/upstream/libint2/CMakeLists.txt :38

find_package(Libint2 2.8.1 CONFIG  # edit in codedeps
#  COMPONENTS
#    sss
#    CXX_ho
#    impure_sh
#    "eri_c4_d0_l${MAX_AM_ERI}" eri_c3_d0_l4 eri_c2_d0_l4 onebody_d0_l4
#     eri_c4_d1_l2              eri_c3_d1_l3 eri_c2_d1_l3 onebody_d1_l3
#                                                         onebody_d2_l3
#  OPTIONAL_COMPONENTS
#     eri_c4_d2_l2              eri_c3_d2_l3 eri_c2_d2_l3
  )