[devhelp] meson: install manpage

[Sébastien Wilmet <swilmet src gnome org>]

commit b96658f04717e961503accaff0fb5a7992d432c4
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Mon Mar 12 17:02:39 2018 +0100

    meson: install manpage

 data/meson.build |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/data/meson.build b/data/meson.build
index a3f8b30..1082859 100644
--- a/data/meson.build
+++ b/data/meson.build
@@ -29,3 +29,8 @@ install_data(
         ['assistant.css', 'assistant.js'],
         install_dir : join_paths(get_option('prefix'), get_option('datadir'), 'devhelp', 'assistant')
 )
+
+install_data(
+        'devhelp.1',
+        install_dir : join_paths(get_option('prefix'), get_option('mandir'), 'man1')
+)