Roll OpenSSL deps.

This is to get a BUILD.gn file formatting fix.

BUG=368019

Review URL: https://codereview.chromium.org/253033002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266807 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -65,7 +65,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling openssl
   # and whatever else without interference from each other.
-  "openssl_revision": "263283",
+  "openssl_revision": "266682",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.