ShellPkg: Add missing header line for SFO flag in 'cls' command

Adding a missing header line for 'cls -sfo' command

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Tapan Shah <tapandshah@hpe.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
2 files changed