[retro-gtk] tests: Move libretro.h and its update script to tests dir

[Adrien Plazas <aplazas src gnome org>]

commit 05f20567a23623b4fac7eaae64e7fffc97c3b26c
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Fri Apr 27 14:05:36 2018 +0200

    tests: Move libretro.h and its update script to tests dir
    
    libretro.h was used only used as a reference and will be needed in the
    next commit to implement a dummy Libretro core to run unit tests.

 UNIMPLEMENTED.md                              | 2 +-
 {retro-gtk => tests}/libretro.h               | 0
 {retro-gtk => tests}/update-from-retroarch.sh | 0
 3 files changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/UNIMPLEMENTED.md b/UNIMPLEMENTED.md
index 4e6a886..ad28488 100644
--- a/UNIMPLEMENTED.md
+++ b/UNIMPLEMENTED.md
@@ -3,7 +3,7 @@
 retro-gtk is a Libretro frontend which reimplements and uses the Libretro API.
 This file lists parts of the Libretro API which are not implemented by
 retro-gtk, please update this file when such features are implemented or when
-updating the reference retro-gtk/libretro.h.
+updating the reference tests/libretro.h.
 
 This has been updated to RetroArch 1.7.2.
 
diff --git a/retro-gtk/libretro.h b/tests/libretro.h
similarity index 100%
rename from retro-gtk/libretro.h
rename to tests/libretro.h
diff --git a/retro-gtk/update-from-retroarch.sh b/tests/update-from-retroarch.sh
similarity index 100%
rename from retro-gtk/update-from-retroarch.sh
rename to tests/update-from-retroarch.sh