Roll src/third_party/boringssl/src 3743aafda..a673d0245

https://boringssl.googlesource.com/boringssl/+log/3743aafdacff2f7b083615a043a37101f740fa53..a673d02458b1b7d897084266b93d5c610e36bd17

The following commits have update notes:
  cefbf9cea Const-correct X509_get0_extensions.

Bug: none
Change-Id: I256c6fcdd9217c1ca4be47409204d41413988b15
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2461604
Commit-Queue: Nick Harper <nharper@chromium.org>
Auto-Submit: Nick Harper <nharper@chromium.org>
Reviewed-by: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819210}

DEPS

@@ -233,7 +233,7 @@ vars = {
   #
   # Note this revision should be updated with
   # third_party/boringssl/roll_boringssl.py, not roll-dep.
-  'boringssl_revision': '3743aafdacff2f7b083615a043a37101f740fa53',
+  'boringssl_revision': 'a673d02458b1b7d897084266b93d5c610e36bd17',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling google-toolbox-for-mac
   # and whatever else without interference from each other.

third_party/boringssl/BUILD.generated.gni

@@ -198,6 +198,7 @@ crypto_sources = [
   "src/crypto/trust_token/internal.h",
   "src/crypto/trust_token/pmbtoken.c",
   "src/crypto/trust_token/trust_token.c",
+  "src/crypto/trust_token/voprf.c",
   "src/crypto/x509/a_digest.c",
   "src/crypto/x509/a_sign.c",
   "src/crypto/x509/a_strex.c",