[gexiv2] build: Change meson option to gtk_doc

[Jens Georg <jensgeorg src gnome org>]

commit 402efeb2952da55921261b5cba8105e1679932ea
Author: Jens Georg <mail jensge org>
Date:   Sun Nov 18 10:46:39 2018 +0100

    build: Change meson option to gtk_doc

 meson.build       | 2 +-
 meson_options.txt | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/meson.build b/meson.build
index 0a645c2..0430365 100644
--- a/meson.build
+++ b/meson.build
@@ -14,7 +14,7 @@ vapi_available = introspection_available and vapigen.found() and get_option('vap
 
 subdir('gexiv2')
 
-if get_option('docs')
+if get_option('gtk_doc')
   subdir('docs')
 endif
 
diff --git a/meson_options.txt b/meson_options.txt
index d21b647..54b3760 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,4 +1,4 @@
-option('docs', type: 'boolean', value: false, description: 'Enable or disable generating the API reference 
(depends on GTK-Doc)')
+option('gtk_doc', type: 'boolean', value: false, description: 'Enable or disable generating the API 
reference (depends on GTK-Doc)')
 option('introspection', type: 'boolean', value : true, description: 'Enable or disable GObject 
Introspection')
 option('vapi', type: 'boolean', value: true, description: 'Enable or disable generation of vala vapi file')
 option('python2-girdir', type: 'string', value : 'auto', description : 'Installation dir for PyGObject2 
overrides (default = auto, no disables python2)')