Merge topic 'IntelLLVM-Fortran-no-isystem'

a80d8e839d IntelLLVM: Revert accidental use of -external:I with Fortran compilers

Acked-by: Kitware Robot <kwrobot@kitware.com>
Reviewed-by: Ben Boeckel <ben.boeckel@kitware.com>
Merge-request: !9368