[network-manager-applet] meson: enable gtk-doc by default

[Lubomir Rintel <lkundrak src gnome org>]

commit cb13875e20ceefa97bd1ce9b9f942be6f2a887d5
Author: Lubomir Rintel <lkundrak v3 sk>
Date:   Mon Oct 16 12:15:51 2017 +0200

    meson: enable gtk-doc by default
    
    The autotools used to automatically detect this. Not an option with
    Meson, but since Meson can't ship prebuilt documentation we should
    ensure the user builds it unless he really doesn't need it.

 meson_options.txt |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson_options.txt b/meson_options.txt
index d5fcbb1..556da56 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -7,5 +7,5 @@ option('enable-gcr', type: 'boolean', value: true, description: 'Enable advanced
 option('with-more-asserts', type: 'string', value: '0', description: 'Enable more assertions for debugging.')
 option('enable-iso-codes', type: 'boolean', value: true, description: 'check for iso-codes at build-time')
 option('enable-ld-gc', type: 'boolean', value: true, description: 'Enable garbage collection of unused 
symbols on linking')
-option('enable-gtk-doc', type: 'boolean', value: false, description: 'use gtk-doc to build documentation')
+option('enable-gtk-doc', type: 'boolean', value: true, description: 'use gtk-doc to build documentation')
 option('enable-introspection', type: 'boolean', value: true, description: 'Enable introspection for this 
build')