[meld] Add man page to Meson build

[Kai Willadsen <kaiw src gnome org>]

commit cef28c38b025f570a4016aa553eea41b379d7a39
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sat Sep 21 11:40:33 2019 +1000

    Add man page to Meson build

 meld.1 => data/meld.1 | 0
 data/meson.build      | 6 ++++++
 meson.build           | 1 +
 3 files changed, 7 insertions(+)
---
diff --git a/meld.1 b/data/meld.1
similarity index 100%
rename from meld.1
rename to data/meld.1
diff --git a/data/meson.build b/data/meson.build
index 159a5550..963c5c22 100644
--- a/data/meson.build
+++ b/data/meson.build
@@ -1,4 +1,10 @@
 
+# Install man page
+install_data(
+  'meld.1',
+  install_dir: join_paths(mandir, 'man1')
+)
+
 # Install schema file
 install_data(
   '@0  gschema xml'.format(application_id),
diff --git a/meson.build b/meson.build
index ee6a8a5d..352844b6 100644
--- a/meson.build
+++ b/meson.build
@@ -25,6 +25,7 @@ bindir = join_paths(prefix, get_option('bindir'))
 datadir = join_paths(prefix, get_option('datadir'))
 libexecdir = join_paths(prefix, get_option('libexecdir'))
 localedir = join_paths(prefix, get_option('localedir'))
+mandir = join_paths(prefix, get_option('mandir'))
 
 appdatadir = join_paths(datadir, 'metainfo')
 desktopdir = join_paths(datadir, 'applications')