examples: [saturation] use new API

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

sha256_mb: add ISAL_ prefix to SHA256 structure and macro definitions

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

examples: reformat with new coding style

Signed-off-by: Marcel Cornu <marcel.d.cornu@intel.com>

saturation test: Core C code

sha1_mb, sha256_mb, sha512_mb, md5_mb, and AES are added.

Change-Id: I8ab79a8308942e997c68efe5a355e1f8905a3ee6
Signed-off-by: Xiaodong Liu <xiaodong.liu@intel.com>