webkitgtk: 2.16.6 -> 2.18.1 for multiple CVEs

See https://webkitgtk.org/security/WSA-2017-0008.html

pkgs/desktops/gnome-3/default.nix

···
     hitori gnome-taquin
   ];
 
-  inherit (pkgs) glib gtk2 webkitgtk216x gtk3 gtkmm3 libcanberra_gtk2
+  inherit (pkgs) glib gtk2 webkitgtk gtk3 gtkmm3 libcanberra_gtk2
     clutter clutter-gst clutter_gtk cogl gtkvnc;
   inherit (pkgs.gnome2) ORBit2;
   libsoup = pkgs.libsoup.override { gnomeSupport = true; };
···
   gtkmm = gtkmm3;
   vala = pkgs.vala_0_32;
   gegl_0_3 = pkgs.gegl_0_3.override { inherit gtk; };
-  webkitgtk = webkitgtk216x;
 
 # Simplify the nixos module and gnome packages
   defaultIconTheme = adwaita-icon-theme;

pkgs/development/libraries/webkitgtk/2.16.nix pkgs/development/libraries/webkitgtk/2.18.nix

···
 , libxml2, libsoup, libsecret, libxslt, harfbuzz, libpthreadstubs, pcre, nettle, libtasn1, p11_kit
 , libidn, libedit, readline, mesa, libintlOrEmpty
 , enableGeoLocation ? true, geoclue2, sqlite
-, gst-plugins-base
+, gst-plugins-base, gst-plugins-bad
 }:
 
 assert enableGeoLocation -> geoclue2 != null;
···
 with stdenv.lib;
 stdenv.mkDerivation rec {
   name = "webkitgtk-${version}";
-  version = "2.16.6";
+  version = "2.18.1";
 
   meta = {
     description = "Web content rendering engine, GTK+ port";
···
 
   src = fetchurl {
     url = "http://webkitgtk.org/releases/${name}.tar.xz";
-    sha256 = "08abxbhi2n1pfby9f2c20z8mpmbvbs2z7vf0p5ckq4jkz46na8zw";
+    sha256 = "15fp7szmkpannx7avsynf0nv3y343qwq0fvq3rz2m2mw5wq7pnww";
   };
 
   # see if we can clean this up....
···
   "-DENABLE_GTKDOC=OFF"
   ];
 
-  # XXX: WebKit2 missing include path for gst-plugins-base.
-  # Filled: https://bugs.webkit.org/show_bug.cgi?id=148894
-  NIX_CFLAGS_COMPILE = "-I${gst-plugins-base.dev}/include/gstreamer-1.0"
-                     + (optionalString stdenv.isDarwin " -lintl");
+  NIX_CFLAGS_COMPILE = optionalString stdenv.isDarwin " -lintl";
 
   nativeBuildInputs = [
     cmake perl python2 ruby bison gperf
···
   buildInputs = libintlOrEmpty ++ [
     gtk2 libwebp enchant libnotify gnutls pcre nettle libidn
     libxml2 libsecret libxslt harfbuzz libpthreadstubs libtasn1 p11_kit
-    sqlite gst-plugins-base libxkbcommon epoxy at_spi2_core
+    sqlite gst-plugins-base gst-plugins-bad libxkbcommon epoxy at_spi2_core
   ] ++ optional enableGeoLocation geoclue2
     ++ (with xlibs; [ libXdmcp libXt libXtst ])
     ++ optionals stdenv.isDarwin [ libedit readline mesa ]

pkgs/development/libraries/wxwidgets/3.0/default.nix

···
 , withMesa ? true, mesa_glu ? null, mesa_noglu ? null
 , compat24 ? false, compat26 ? true, unicode ? true
 , withGtk2 ? true
-, withWebKit ? false, webkitgtk24x-gtk2 ? null, webkitgtk216x ? null
+, withWebKit ? false, webkitgtk24x-gtk2 ? null, webkitgtk218x ? null
 , AGL ? null, Carbon ? null, Cocoa ? null, Kernel ? null, QTKit ? null
 }:
 
 
 assert withMesa -> mesa_glu != null && mesa_noglu != null;
-assert withWebKit -> (if withGtk2 then webkitgtk24x-gtk2 else webkitgtk216x) != null;
+assert withWebKit -> (if withGtk2 then webkitgtk24x-gtk2 else webkitgtk218x) != null;
 
 with stdenv.lib;
 
···
     [ (if withGtk2 then gtk2 else gtk3) libXinerama libSM libXxf86vm xf86vidmodeproto gstreamer
       gst-plugins-base GConf ]
     ++ optional withMesa mesa_glu
-    ++ optional withWebKit (if withGtk2 then webkitgtk24x-gtk2 else webkitgtk216x)
+    ++ optional withWebKit (if withGtk2 then webkitgtk24x-gtk2 else webkitgtk218x)
     ++ optionals stdenv.isDarwin [ setfile Carbon Cocoa Kernel QTKit ];
 
   nativeBuildInputs = [ pkgconfig ];

pkgs/top-level/all-packages.nix

···
 
   wcslib = callPackage ../development/libraries/wcslib { };
 
-  webkitgtk = webkitgtk216x;
+  webkitgtk = webkitgtk218x;
 
   webkitgtk24x-gtk3 = callPackage ../development/libraries/webkitgtk/2.4.nix {
     harfbuzz = harfbuzz-icu;
···
     inherit (darwin) libobjc;
   };
 
-  webkitgtk216x = callPackage ../development/libraries/webkitgtk/2.16.nix {
+  webkitgtk218x = callPackage ../development/libraries/webkitgtk/2.16.nix {
     harfbuzz = harfbuzz-icu;
-    gst-plugins-base = gst_all_1.gst-plugins-base;
+    inherit (gst_all_1) gst-plugins-base gst-plugins-bad;
   };
 
   webkitgtk217x = callPackage ../development/libraries/webkitgtk/2.17.nix {