[tracker-miners] meson: Fix use of invalid 'default' keyword in meson_options.txt

[Sam Thursfield <sthursfield src gnome org>]

commit a500857383a9058a7cfaf1a5a0382d4f1367fb51
Author: Sam Thursfield <sam thursfield codethink co uk>
Date:   Tue Oct 31 14:42:05 2017 +0000

    meson: Fix use of invalid 'default' keyword in meson_options.txt
    
    The correct keyword is 'value'.

 meson_options.txt |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/meson_options.txt b/meson_options.txt
index 0698433..81e68c4 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -39,7 +39,7 @@ option('stemmer', type: 'combo', choices: ['auto', 'no', 'yes'], value: 'no',
 option('unicode_support', type: 'combo', choices: ['icu', 'unistring', 'auto'], value: 'auto',
        description: 'Unicode support library to use')
 
-option('dbus_services', type: 'string', default: '',
+option('dbus_services', type: 'string', value: '',
        description: 'Directory to install D-Bus .service files (leave blank to use the value from 
dbus-1.pc)')
-option('systemd_user_services', type: 'string', default: 'yes',
+option('systemd_user_services', type: 'string', value: 'yes',
        description: 'Directory to install systemd user .service files (or "yes" for default directory, "no" 
to disable installation)')