Roll BoringSSL 40acdae..ef4962f

Summary of changes available at:
https://boringssl.googlesource.com/boringssl/+log/40acdae..ef4962f

BUG=none

Review URL: https://codereview.chromium.org/1067373003

Cr-Commit-Position: refs/heads/master@{#324289}

DEPS

@@ -74,7 +74,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.
-  'boringssl_revision': '40acdaeb86c516b68e3442f3a008e8d21e514bda',
+  'boringssl_revision': 'ef4962f5a38fd68f0b89b67fc5e13da70e4288f6',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling nss
   # and whatever else without interference from each other.

third_party/boringssl/boringssl.gypi

@@ -130,6 +130,7 @@
       'src/crypto/evp/digestsign.c',
       'src/crypto/evp/evp.c',
       'src/crypto/evp/evp_ctx.c',
+      'src/crypto/evp/p_dsa_asn1.c',
       'src/crypto/evp/p_ec.c',
       'src/crypto/evp/p_ec_asn1.c',
       'src/crypto/evp/p_hmac.c',