Update nss_revision to r265958.

Include the following CLs:

Implement AES in different modes of operation, using AES-NI and
PCLMULQDQ-NI, for WIN32 and WIN64 platforms. Only the WIN32 assembly
code is used right now.
https://codereview.chromium.org/250463004/

R=agl@chromium.org,rsleevi@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/259643003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266082 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -57,7 +57,7 @@ vars = {
   # and V8 without interference from each other.
   "webrtc_revision": "5963",
   "jsoncpp_revision": "248",
-  "nss_revision": "259440",
+  "nss_revision": "265958",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.