[gnome-software] build: limba: Respect enable-limba flag

[Jeremy Bicha <jbicha src gnome org>]

commit c1f8ef5a253b22bd3e89d8087c6122eed70bc7a3
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Mon May 15 12:45:51 2017 -0400

    build: limba: Respect enable-limba flag
    
    https://bugzilla.gnome.org/show_bug.cgi?id=782662

 plugins/meson.build |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/plugins/meson.build b/plugins/meson.build
index f32b114..d1761f7 100644
--- a/plugins/meson.build
+++ b/plugins/meson.build
@@ -20,7 +20,9 @@ endif
 if get_option('enable-firmware')
   subdir('fwupd')
 endif
-subdir('limba')
+if get_option('enable-limba')
+   subdir('limba')
+endif
 if get_option('enable-gudev')
   subdir('modalias')
 endif