Roll nss_revision to r266724.

Includes the following CLs:

Disable Intel AES assembly code on Windows because of memory corruption
in the GCM assembly code.
https://codereview.chromium.org/258013011/

R=agl@chromium.org
BUG=367515

Review URL: https://codereview.chromium.org/253873005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266867 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": "265958",
+  "nss_revision": "266724",
   # 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.