[gnome-session] build: Restore options default values

[Iñigo Martínez <inigomartinez src gnome org>]

commit f62989f154e00cee60912beb64bd9917127480f2
Author: Iñigo Martínez <inigomartinez gmail com>
Date:   Sat Nov 18 11:36:39 2017 +0100

    build: Restore options default values
    
    During the migration to meson build system, the default value of
    different options were changed.
    
    This patch restores those default values.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790486

 meson_options.txt |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/meson_options.txt b/meson_options.txt
index 0d2e127..ed3059d 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,6 +1,6 @@
 option('deprecation_flags', type: 'boolean', value: false, description: 'use *_DISABLE_DEPRECATED flags')
 option('session_selector', type: 'boolean', value: false, description: 'enable building a custom session 
selector dialog')
-option('systemd', type: 'boolean', value: false, description: 'Use systemd')
+option('systemd', type: 'boolean', value: true, description: 'Use systemd')
 option('consolekit', type: 'boolean', value: false, description: 'Use consolekit')
-option('docbook', type: 'boolean', value: false, description: 'build documentation')
-option('man', type: 'boolean', value: false, description: 'build documentation (requires xmlto)')
+option('docbook', type: 'boolean', value: true, description: 'build documentation')
+option('man', type: 'boolean', value: true, description: 'build documentation (requires xmlto)')