gstreamer: 1.8.0 -> 1.8.1 (bugfixes)

Release notes:
https://gstreamer.freedesktop.org/releases/gstreamer/1.8.1.html

Tested with nox-review; this change does not introduce build breakage.

pkgs/development/libraries/gstreamer/good/default.nix

@@ -10,7 +10,7 @@ let
   inherit (stdenv.lib) optionals optionalString;
 in
 stdenv.mkDerivation rec {
-  name = "gst-plugins-good-1.8.0";
+  name = "gst-plugins-good-1.8.1";
 
   meta = with stdenv.lib; {
     description = "Gstreamer Good Plugins";
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gst-plugins-good/${name}.tar.xz";
-    sha256 = "0kczdvqxvl8kxiy2d7czv16jp73hv9k3nykh47ckihnv8x6i6362";
+    sha256 = "0wh9mpz3zj7vbdi3xn9gjncqal86kgxn9pdg5vl98y6n45wy20r1";
   };
 
   outputs = [ "dev" "out" ];