SKF SDK GM Encrypt, Decrypt, Hash, Digest.

Now support GM SKF interfaces, such as:

1 SKF_EnumDev;

2 SKF_ConnectDev;

3 SKF_DisConnectDev;

4 SKF_GenRandom;

5 SKF_GenECCKeyPair;

6 SKF_ImportECCKeyPair;

7 SKF_ImportCertificate;

8 SKF_ExportCertificate;