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/bad/default.nix

@@ -14,7 +14,7 @@ let
   inherit (stdenv.lib) optional optionalString;
 in
 stdenv.mkDerivation rec {
-  name = "gst-plugins-bad-1.8.0";
+  name = "gst-plugins-bad-1.8.1";
 
   meta = with stdenv.lib; {
     description = "Gstreamer Bad Plugins";
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gst-plugins-bad/${name}.tar.xz";
-    sha256 = "03m99igngm37653353n5d724bcqw7p6hw6xjw0i2824523fpcqqi";
+    sha256 = "1xa0r98vf0sxw6s90yysvfpzs9yl07xxdci0lv2c0kvkcgrmig8b";
   };
 
   outputs = [ "dev" "out" ];