gnome3.gnome-settings-daemon: Use absolute path of mousetweaks

See: https://github.com/NixOS/nixpkgs/pull/60176#issuecomment-486401686

pkgs/desktops/gnome-3/core/gnome-settings-daemon/default.nix

@@ -13,6 +13,7 @@
 , libgnomekbd
 , lcms2
 , libpulseaudio
+, mousetweaks
 , alsaLib
 , libcanberra-gtk3
 , upower
@@ -48,7 +49,7 @@ stdenv.mkDerivation rec {
   patches = [
     (substituteAll {
       src = ./fix-paths.patch;
-      inherit tzdata;
+      inherit tzdata mousetweaks;
     })
   ];
 

pkgs/desktops/gnome-3/core/gnome-settings-daemon/fix-paths.patch

@@ -13,3 +13,14 @@
  
  typedef struct _TzDB TzDB;
  typedef struct _TzLocation TzLocation;
+--- a/plugins/mouse/gsd-mouse-manager.c
++++ b/plugins/mouse/gsd-mouse-manager.c
+@@ -118,7 +118,7 @@ set_mousetweaks_daemon (GsdMouseManager *manager,
+         gboolean run_daemon = dwell_click_enabled || secondary_click_enabled;
+
+         if (run_daemon || manager->priv->mousetweaks_daemon_running)
+-                comm = g_strdup_printf ("mousetweaks %s",
++                comm = g_strdup_printf ("@mousetweaks@/bin/mousetweaks %s",
+                                         run_daemon ? "" : "-s");
+         else
+                 return;