Roll src/third_party/boringssl/src 4dfd5af70..81080a729

https://boringssl.googlesource.com/boringssl/+log/4dfd5af70191b068aebe567b8e29ce108cee85ce..81080a729af568f7b5fde92b9170cc17065027c9

Bug: none
Change-Id: I8594a6383f0d0977c8978f316685b1aa17c40f24
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1743128
Auto-Submit: David Benjamin <davidben@chromium.org>
Commit-Queue: Steven Valdez <svaldez@chromium.org>
Reviewed-by: Steven Valdez <svaldez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#685278}

DEPS

@@ -172,7 +172,7 @@ vars = {
   #
   # Note this revision should be updated with
   # third_party/boringssl/roll_boringssl.py, not roll-dep.
-  'boringssl_revision': '4dfd5af70191b068aebe567b8e29ce108cee85ce',
+  'boringssl_revision': '81080a729af568f7b5fde92b9170cc17065027c9',
   # 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

@@ -110,6 +110,8 @@ crypto_sources = [
   "src/crypto/evp/p_ed25519_asn1.c",
   "src/crypto/evp/p_rsa.c",
   "src/crypto/evp/p_rsa_asn1.c",
+  "src/crypto/evp/p_x25519.c",
+  "src/crypto/evp/p_x25519_asn1.c",
   "src/crypto/evp/pbkdf.c",
   "src/crypto/evp/print.c",
   "src/crypto/evp/scrypt.c",