[gtk+] Install css api test again

[Matthias Clasen <matthiasc src gnome org>]

commit a45e497fdf41b7194eae55412f50acbddf1c377c
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Oct 9 23:35:19 2017 -0400

    Install css api test again

 testsuite/css/meson.build |   19 ++++++++++++++++++-
 1 files changed, 18 insertions(+), 1 deletions(-)
---
diff --git a/testsuite/css/meson.build b/testsuite/css/meson.build
index e90cd77..e3f6fb3 100644
--- a/testsuite/css/meson.build
+++ b/testsuite/css/meson.build
@@ -2,5 +2,22 @@ subdir('parser')
 subdir('nodes')
 subdir('style')
 
-test_api = executable('api', 'api.c', dependencies: libgtk_dep)
+gtk_libexecdir = join_paths(gtk_prefix, get_option('libexecdir'))
+testdatadir = join_paths(gtk_datadir, 'installed-tests/gtk4')
+testexecdir = join_paths(gtk_libexecdir, 'installed-tests/gtk4/css')
+
+test_api = executable('api', 'api.c',
+                      install: get_option('install-tests'),
+                      install_dir: testexecdir,
+                      dependencies: libgtk_dep)
 test('css/api', test_api)
+
+if get_option('install-tests')
+  conf = configuration_data()
+  conf.set('libexecdir', gtk_libexecdir)
+  configure_file(input: 'api.test.in',
+                 output: 'api.test',
+                 configuration: conf,
+                 install_dir: testdatadir)
+endif
+