NaCl: Update revision in DEPS, 6937d61 -> 660eb1e

DEPS

 # This file is used to manage the dependencies of the Chromium src repo. It is
 # used by gclient to determine what version of each dependency to check out, and
 # where.
 #
 # For more information, please refer to the official documentation:
 #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/get-the-code
 #
 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 #
@@ skipping 76 matching lines @@
   # the commit queue can handle CLs rolling lighttpd
   # and whatever else without interference from each other.
   'lighttpd_revision': '9dfa55d15937a688a92cbf2b7a8621b0927d06eb',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling lss
   # and whatever else without interference from each other.
   'lss_revision': '6f97298fe3794e92c8c896a6bc06e0b36e4c3de3',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling NaCl
   # and whatever else without interference from each other.
-  'nacl_revision': '6937d61627c025d697f70b5a09d02f192a71e157',
+  'nacl_revision': '660eb1e1c91349b53f0d60bbf9a92e31f4cf4e1d',
 }
 
 # Only these hosts are allowed for dependencies in this DEPS file.
 # If you need to add a new host, contact chrome infrastracture team.
 allowed_hosts = [
   'chromium.googlesource.com',
   'boringssl.googlesource.com',
   'pdfium.googlesource.com',
   'android.googlesource.com',
 ]
@@ skipping 676 matching lines @@
     # corresponding .py files have already been deleted.
     'name': 'remove_stale_pyc_files',
     'pattern': 'src/tools/.*\\.py',
     'action': [
         'python',
         'src/tools/remove_stale_pyc_files.py',
         'src/tools',
     ],
   },
 ]