[gnome-games] meson: Reenable MAME plugin

[Alexander Mikhaylenko <alexm src gnome org>]

commit ff4aeb5cc76a308b2d7ce83e30649b3371cad84c
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Fri Nov 15 01:35:55 2019 +0500

    meson: Reenable MAME plugin
    
    Turns out most of the slowness was caused by continuous yields. When it's
    threaded, it's fast, so reenable it.
    
    Effectively reverts 939062e68f3447a7d33ad1778af501c4f62e654c

 meson_options.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson_options.txt b/meson_options.txt
index 998ffb44..1a9844fd 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -15,7 +15,7 @@ option ('dreamcast-plugin',     description: 'Support for Dreamcast games',
 option ('game-cube-plugin',     description: 'Support for GameCube games',      type: 'boolean')
 option ('libretro-plugin',      description: 'Support for Libretro games',      type: 'boolean')
 option ('love-plugin',          description: 'Support for LÖVE games',          type: 'boolean')
-option ('mame-plugin',          description: 'Support for MAME games',          type: 'boolean', value: 
false)
+option ('mame-plugin',          description: 'Support for MAME games',          type: 'boolean')
 option ('ms-dos-plugin',        description: 'Support for MS-DOS games',        type: 'boolean')
 option ('nintendo-ds-plugin',   description: 'Support for Nintendo DS games',   type: 'boolean')
 option ('playstation-plugin',   description: 'Support for PlayStation games',   type: 'boolean')