Also print name for SSL_SIGN_RSA_PKCS1_MD5_SHA1.

Missed one.

Change-Id: I61394db2dded0741cffa977071be998e3f4e4b50
Reviewed-on: https://boringssl-review.googlesource.com/22645
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

ssl/ssl_privkey.cc

diff --git a/ssl/ssl_privkey.cc b/ssl/ssl_privkey.cc
index da037d7..e9990af 100644
--- a/ssl/ssl_privkey.cc
+++ b/ssl/ssl_privkey.cc
@@ -441,6 +441,8 @@
 const char *SSL_get_signature_algorithm_name(uint16_t sigalg,
                                              int include_curve) {
   switch (sigalg) {
+    case SSL_SIGN_RSA_PKCS1_MD5_SHA1:
+      return "rsa_pkcs1_md5_sha1";
     case SSL_SIGN_RSA_PKCS1_SHA1:
       return "rsa_pkcs1_sha1";
     case SSL_SIGN_RSA_PKCS1_SHA256: