gstreamer: 1.15.1 -> 1.16.0

Changes needed:

* core: dbghelp disabled as it's not needed
* core: Fixed script not being executable and skipped by patchShebangs
* base: gtk_doc disabled because of wayland symbol error
* ges: Patch removed that was merged upstream:
  https://bugzilla.gnome.org/show_bug.cgi?id=794856#c16

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

@@ -5,7 +5,7 @@
 
 stdenv.mkDerivation rec {
   name = "gstreamer-editing-services-${version}";
-  version = "1.14.4";
+  version = "1.16.0";
 
   meta = with stdenv.lib; {
     description = "Library for creation of audio/video non-linear editors";
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "${meta.homepage}/src/gstreamer-editing-services/${name}.tar.xz";
-    sha256 = "0pxk65jib3mqszjkyvlzklwia4kbdj6j2b6jw1d502b06mdx5lak";
+    sha256 = "1las94jkx83sxmzi5w6b0xm89dqqwzpdsb6h9w9ixndhnbpzm8w2";
   };
 
   outputs = [ "out" "dev" ];
@@ -26,10 +26,6 @@ stdenv.mkDerivation rec {
   propagatedBuildInputs = [ gst-plugins-base libxml2 ];
 
   patches = [
-    (fetchpatch {
-        url = "https://bug794856.bugzilla-attachments.gnome.org/attachment.cgi?id=370413";
-        sha256 = "1xcgbs18g6n5p7z7kqj7ffakwmkxq7ijajyvhyl7p3zvqll9dc7x";
-    })
     ./fix_pkgconfig_includedir.patch
   ];