ui/gtk: fix gettext message's charset.

Signed-off-by: yanminhui <yanminhui163@163.com>
Message-Id: <20191116031037.1207-1-yanminhui163@163.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

po/zh_CN.po

@@ -66,7 +66,7 @@ msgid "Detach Tab"
 msgstr "分离标签页"
 
 msgid "Show Menubar"
-msgstr ""
+msgstr "显示菜单栏"
 
 msgid "_Machine"
 msgstr "虚拟机(_M)"

ui/gtk.c

@@ -2215,6 +2215,7 @@ static void gtk_display_init(DisplayState *ds, DisplayOptions *opts)
     setlocale(LC_MESSAGES, "");
     setlocale(LC_CTYPE, "C.UTF-8");
     bindtextdomain("qemu", CONFIG_QEMU_LOCALEDIR);
+    bind_textdomain_codeset("qemu", "UTF-8");
     textdomain("qemu");
 
     window_display = gtk_widget_get_display(s->window);