[gnome-apps-nightly] TweakTool: fix command name

[Christian Hergert <chergert src gnome org>]

commit aee2c8748f46444598b283345e807f5e30be5154
Author: Christian Hergert <chergert redhat com>
Date:   Thu Sep 7 17:33:54 2017 -0700

    TweakTool: fix command name
    
    This is what it looks like it is based on the log and meson.build.

 org.gnome.TweakTool.json |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/org.gnome.TweakTool.json b/org.gnome.TweakTool.json
index 2aa3e72..05a3e39 100644
--- a/org.gnome.TweakTool.json
+++ b/org.gnome.TweakTool.json
@@ -3,7 +3,7 @@
     "runtime": "org.gnome.Platform",
     "runtime-version": "master",
     "sdk": "org.gnome.Sdk",
-    "command": "gnome-tweaks",
+    "command": "gnome-tweak-tool",
     "tags": ["nightly"],
     "copy-icon": true,
     "rename-icon": "gnome-tweak-tool",