[retro-gtk] dist: Add missing C headers

[Adrien Plazas <aplazas src gnome org>]

commit 8a789ef1dd5a01f571a003d646ec9e2269145196
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Tue Jul 18 09:39:18 2017 +0200

    dist: Add missing C headers

 retro-gtk/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/retro-gtk/Makefile.am b/retro-gtk/Makefile.am
index d74108a..ffc953b 100644
--- a/retro-gtk/Makefile.am
+++ b/retro-gtk/Makefile.am
@@ -146,6 +146,8 @@ pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = retro-gtk-0.12.pc
 
 EXTRA_DIST = \
+       retro-core.h \
+       retro-rotation.h \
        retro-gtk-0.12.pc.in \
        update-from-retroarch.sh \
        $(NULL)