Roll pyftpdlib DEPS to fix licensecheck issues.

DEPS

 vars = {
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
   "googlecode_url": "http://%s.googlecode.com/svn",
   "sourceforge_url": "http://%(repo)s.svn.sourceforge.net/svnroot/%(repo)s",
   "webkit_trunk": "http://svn.webkit.org/repository/webkit/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
   "webkit_revision": "105603",
   "chromium_git": "http://git.chromium.org/git",
   "swig_revision": "69281",
@@ skipping 248 matching lines @@
   "src/third_party/yasm/source/patched-yasm":
     "/trunk/deps/third_party/yasm/patched-yasm@73761",
 
   "src/third_party/libjpeg_turbo":
     "/trunk/deps/third_party/libjpeg_turbo@118072",
 
   "src/third_party/flac":
     "/trunk/deps/third_party/flac@118218",
 
   "src/third_party/pyftpdlib/src":
-    (Var("googlecode_url") % "pyftpdlib") + "/trunk@888",
+    (Var("googlecode_url") % "pyftpdlib") + "/trunk@977",
 
   # Needed to support nacl browser test jig.
   "src/third_party/pylib":
     Var("nacl_trunk") + "/src/third_party/pylib@" + Var("nacl_tools_revision"),
   "src/third_party/scons-2.0.1":
     Var("nacl_trunk") + "/src/third_party/scons-2.0.1@" +
         Var("nacl_tools_revision"),
 
   "src/third_party/webrtc":
     (Var("googlecode_url") % "webrtc") + "/trunk/src@" + Var("webrtc_revision"),
@@ skipping 195 matching lines @@
     # which takes ~20s, but clang speeds up builds by more than 20s.
     "pattern": ".",
     "action": ["python", "src/tools/clang/scripts/update.py", "--mac-only"],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]