snapper: Move D-Bus conf file to share/dbus-1/system.d

Since D-Bus 1.9.18 configuration files installed by third-party should
go in share/dbus-1/system.d. The old location is for sysadmin overrides.

pkgs/tools/misc/snapper/default.nix

@@ -1,7 +1,7 @@
 { stdenv, fetchFromGitHub
 , autoreconfHook, pkgconfig, docbook_xsl, libxslt, docbook_xml_dtd_45
 , acl, attr, boost, btrfs-progs, dbus, diffutils, e2fsprogs, libxml2
-, lvm2, pam, python, utillinux }:
+, lvm2, pam, python, utillinux, fetchpatch }:
 
 stdenv.mkDerivation rec {
   pname = "snapper";
@@ -23,6 +23,14 @@ stdenv.mkDerivation rec {
     lvm2 pam python utillinux
   ];
 
+  patches = [
+    # Don't use etc/dbus-1/system.d
+    (fetchpatch {
+      url = "https://github.com/openSUSE/snapper/commit/c51708aea22d9436da287cba84424557ad03644b.patch";
+      sha256 = "106pf7pv8z3q37c8ckmgwxs1phf2fy7l53a9g5xq5kk2rjj1cx34";
+    })
+  ];
+
   postPatch = ''
     # Hard-coded root paths, hard-coded root paths everywhere...
     for file in {client,data,pam,scripts}/Makefile.am; do