[gnome-tweak-tool] Add translator comments to the .desktop file

[Piotr Drąg <piotrdrag src gnome org>]

commit 68efb5c2b6cc97fd1a290aa514c1137bab3e3ba2
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue May 30 18:58:03 2017 +0200

    Add translator comments to the .desktop file
    
    Hopefully, we’ll get fewer broken translations.

 data/gnome-tweak-tool.desktop.in |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/data/gnome-tweak-tool.desktop.in b/data/gnome-tweak-tool.desktop.in
index 61a3f56..9dc6117 100644
--- a/data/gnome-tweak-tool.desktop.in
+++ b/data/gnome-tweak-tool.desktop.in
@@ -1,11 +1,13 @@
 [Desktop Entry]
 Name=Tweak Tool
 Comment=Tweak advanced GNOME 3 settings
+# Translators: Do NOT translate or transliterate this text (this is an icon file name)!
 Icon=gnome-tweak-tool
 Exec=gnome-tweak-tool
 Terminal=false
 Type=Application
 StartupNotify=true
 Categories=GNOME;GTK;Utility;
+# Translators: Search terms to find this application. Do NOT translate or localize the semicolons! The list 
MUST also end with a semicolon!
 Keywords=Settings;Advanced;Preferences;Extensions;Fonts;Theme;XKB;Keyboard;Typing;
 OnlyShowIn=GNOME;Unity;Pantheon;