[recipes] Use existing meson support for help

[Matthias Clasen <matthiasc src gnome org>]

commit ac0b005d2389731f298af29322d1609ae9f61c09
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Mar 18 17:20:05 2017 -0400

    Use existing meson support for help
    
    It was pointed out to me that meson already supports
    mallard documentation since version 0.36.0.
    Lets use this!

 help/meson.build |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/help/meson.build b/help/meson.build
index 876d7f1..642a254 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -1,2 +1,4 @@
-install_data ('C/index.page',
-              install_dir: join_paths([datadir,'help/C/org.gnome.Recipes']))
+gnome.yelp('org.gnome.Recipes',
+           sources: ['index.page'],
+           media: [],
+           languages: ['de'])