[libgda] Meson: fix libgda headers installation

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 03d31c94c44099f95f7f58485b516a3d1d34cb01
Author: Daniel Espinosa <esodan gmail com>
Date:   Fri Sep 21 14:48:25 2018 -0500

    Meson: fix libgda headers installation

 libgda/meson.build | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/libgda/meson.build b/libgda/meson.build
index 8e3636de7..9b1084615 100644
--- a/libgda/meson.build
+++ b/libgda/meson.build
@@ -31,6 +31,9 @@ libgda_virtualh = configure_file(
                output : 'libgda.h',
                configuration : conf)
 
+install_headers(libgda_virtualh,
+       install_dir: join_paths(get_option('includedir'),project_package,'libgda')
+       )
 
 gda_marshalls = gnome_module.genmarshal('gda-marshal',prefix : '_gda_marshal',
                                        sources : 'gda-marshal.list')
@@ -129,6 +132,10 @@ libgda_headers_all += [
        gda_enum_headers
        ]
 
+install_headers(libgda_headers_all,
+       install_dir: join_paths(get_option('includedir'),project_package,'libgda')
+       )
+
 libgda_sources= files([
        'gda-attributes-manager.c',
        'gda-batch.c',