[grilo-plugins] tests: Fix dist with lua-factory disabled

[Bastien Nocera <hadess src gnome org>]

commit d53499d3876b1effd3d7893c3be3e9ca61d6eafe
Author: Bastien Nocera <hadess hadess net>
Date:   Thu May 19 18:43:40 2016 +0200

    tests: Fix dist with lua-factory disabled
    
    https://bugzilla.gnome.org/show_bug.cgi?id=766678

 tests/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 0bf6a3f..5ed6c85 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -37,6 +37,7 @@ endif
 
 DIST_SUBDIRS =    \
    dleyna         \
+   games          \
    spotify-cover  \
    local-metadata \
    lua-factory    \