Add gEfiShellDynamicCommandProtocolGuid to pass build.

(Sync part of patch r16445 from main trunk.)

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Samer El-Haj-Mahmoud <elhaj@hp.com>
Reviewed-by: jaben carsey <jaben.carsey@intel.com> 

git-svn-id: svn://svn.code.sf.net/p/edk2/code/branches/UDK2014.SP1/ShellPkg@16491 6f19259b-4bc3-4df7-8a09-765794883524