Add IMAGE_ATTRIBUTE_UEFI_IMAGE definition from UEFI 2.4 specification.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Samer El-Haj-Mahmoud elhaj@hp.com 
Reviewed-by: Gao, Liming <liming.gao@intel.com>

git-svn-id: svn://svn.code.sf.net/p/edk2/code/trunk/edk2/MdePkg@15970 6f19259b-4bc3-4df7-8a09-765794883524