Support IMA as an integrity service provider.
Signed-off-by: Nluanshi <zhangliguang@linux.alibaba.com>
Reviewed-by: Jia Zhang <zhang.jia@linux.alibaba.com>
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
Signed-off-by: NCaspar Zhang <caspar@linux.alibaba.com>