Add testmgr test vectors for SM2 algorithm. These vectors come
from `openssl pkeyutl -sign` and libgcrypt.
Signed-off-by: NTianjia Zhang <tianjia.zhang@linux.alibaba.com>
Tested-by: NXufeng Zhang <yunbo.xufeng@linux.alibaba.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>