"rpm-build" is the building requirement on OpenSUSE, add this missing package in "Build.pdf"
"rpm-build" is the building requirement on OpenSUSE, add this missing package in "Build.pdf"

Signed-off-by: Dave Chen <bd9a23c9ef2ab41379ad9e2a3ed5e0d59cdc0f00@intel.com>

baaltommysu/OpenAttestation,baaltommysu/OpenAttestation,baaltommysu/OpenAttestation,baaltommysu/OpenAttestation,baaltommysu/OpenAttestation