Roll libjingle to r124 and roll webrtc to 1888.

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": "109636",
   "chromium_git": "http://git.chromium.org/git",
   "swig_revision": "69281",
@@ skipping 19 matching lines @@
       "a1be3e4ecea3f3d3becfff6860e8a593ec014d81",
   "nacl_toolchain_pnacl_linux_x86_64_hash":
       "f34c8efb57ca0d1f9fb3f71d9e343bfa7026bd03",
   "nacl_toolchain_win_x86_hash":
       "6a8fd328bcbdaa88887a39fd9a83a006129b44dd",
   "nacl_toolchain_win_x86_newlib_hash":
       "bd8dd553c9998e7bf826f5746c8ef69c3c5e5ac7",
   "nacl_toolchain_revision": "7799",
   "pnacl_toolchain_revision": "7799",
 
-  "libjingle_revision": "119",
+  "libjingle_revision": "122",
   "libphonenumber_revision": "425",
   "libvpx_revision": "123809",
   "lss_revision": "9",
 
   # These two FFmpeg variables must be updated together.  One is used for SVN
   # checkouts and the other for Git checkouts.
   "ffmpeg_revision": "124825",
   "ffmpeg_hash": "baa5f11e7dc682b2bb5545e9fbf037090b99fff1",
 
   "sfntly_revision": "128",
@@ skipping 462 matching lines @@
     "pattern": ".",
     "action": ["python", "src/build/util/lastchange.py",
                "-o", "src/build/util/LASTCHANGE"],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]