ima: Execute parser to upload digest lists not recognizable by the kernel

hulk inclusion
category: feature
feature: IMA Digest Lists extension
bugzilla: 46797

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This patch limits the digest lists processed by the kernel by excluding
those that are not in the compact format. The patch then executes the
user space parsers to process the skipped digest lists.

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Acked-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>