Support additional OIDs for SignedCms digest algorithms

Support additional OIDs for SignedCms digest algorithms

If an existing CMS has a digest algorithm identifier of {Digest}withRSA, the algorithm will be treated as unknown, however this works in the Desktop .NET Framework. This adds support for those algorithm identifiers for signature verification, but not for creation.

Commit migrated from https://github.com/dotnet/corefx/commit/e40dbeb9c4adfec29e291e11e98d92924efea673