[vala] valadoc/tests: Add the source vapi directory to driver-test

[Rico Tzschichholz <ricotz src gnome org>]

commit c89c305ceb63c9b4ba017eec4a3daf734e822651
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sat Aug 19 13:05:22 2017 +0200

    valadoc/tests: Add the source vapi directory to driver-test
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786505

 valadoc/tests/drivers/generic-api-test.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/valadoc/tests/drivers/generic-api-test.vala b/valadoc/tests/drivers/generic-api-test.vala
index bf71bfe..7591205 100644
--- a/valadoc/tests/drivers/generic-api-test.vala
+++ b/valadoc/tests/drivers/generic-api-test.vala
@@ -2720,6 +2720,7 @@ public static void test_driver () {
        settings.with_deps = false;
        settings.verbose = false;
        settings.wiki_directory = null;
+       settings.vapi_directories = { Path.build_filename (TOP_SRC_DIR, "vapi") };
        settings.pkg_name = "out";
        settings.path = "out";