Add to CT log list Digicert2 and Symantec Sirius.

Digicert CT2 completed probation on 2017-Jun-04.
Symantec Sirius completed probation on 2017-May-30.

R=rsleevi@chromium.org
BUG=698094,692782

Review-Url: https://codereview.chromium.org/2923193002
Cr-Commit-Position: refs/heads/master@{#481160}

net/data/ssl/certificate_transparency/log_list.json

@@ -66,6 +66,16 @@
    ],
    "dns_api_endpoint": "digicert.ct.googleapis.com"
   },
+  {
+   "description": "DigiCert Log Server 2",
+   "key": "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEzF05L2a4TH/BLgOhNKPoioYCrkoRxvcmajeb8Dj4XQmNY+gxa4Zmz3mzJTwe33i0qMVp+rfwgnliQ/bM/oFmhA==",
+   "url": "ct2.digicert-ct.com/log/",
+   "maximum_merge_delay": 86400,
+   "operated_by": [
+    1
+   ],
+   "dns_api_endpoint": "digicert2.ct.googleapis.com"
+  },
   {
    "description": "Symantec log",
    "key": "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEluqsHEYMG1XcDfy1lCdGV0JwOmkY4r87xNuroPS2bMBTP01CEDPwWJePa75y9CrsHEKqAy8afig1dpkIPSEUhg==",
@@ -86,6 +96,16 @@
    ],
    "dns_api_endpoint": "symantec-vega.ct.googleapis.com"
   },
+  {
+   "description": "Symantec 'Sirius' log",
+   "key": "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEowJkhCK7JewN47zCyYl93UXQ7uYVhY/Z5xcbE4Dq7bKFN61qxdglnfr0tPNuFiglN+qjN2Syxwv9UeXBBfQOtQ==",
+   "url": "sirius.ws.symantec.com/",
+   "maximum_merge_delay": 86400,
+   "operated_by": [
+    2
+   ],
+   "dns_api_endpoint": "symantec-sirius.ct.googleapis.com"
+  },
   {
    "description": "Certly.IO log",
    "key": "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAECyPLhWKYYUgEc+tUXfPQB4wtGS2MNvXrjwFCCnyYJifBtd2Sk7Cu+Js9DNhMTh35FftHaHu6ZrclnNBKwmbbSA==",