derive Debug for RingAlgorithm, AwsLcRsAlgorithm

The `SignatureVerificationAlgorithm` in pki-types was changed to have
a `Debug` bound, so these types needs to be `Debug` to implement the
trait.

src/aws_lc_rs_algs.rs

@@ -7,6 +7,7 @@ use crate::signed_data::alg_id;
 // so this is very similar to ring_algs.rs.
 
 /// A `SignatureVerificationAlgorithm` implemented using aws-lc-rs.
+#[derive(Debug)]
 struct AwsLcRsAlgorithm {
     public_key_alg_id: AlgorithmIdentifier,
     signature_alg_id: AlgorithmIdentifier,

src/ring_algs.rs

@@ -18,6 +18,7 @@ use ring::signature;
 use crate::signed_data::alg_id;
 
 /// A `SignatureVerificationAlgorithm` implemented using *ring*.
+#[derive(Debug)]
 struct RingAlgorithm {
     public_key_alg_id: AlgorithmIdentifier,
     signature_alg_id: AlgorithmIdentifier,