[libgnome-games-support] Build with --abi-stability

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 5bf8232a525e3ef399e0f82f9bc04cb83ba1487f
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sat Feb 17 17:35:13 2018 -0600

    Build with --abi-stability
    
    This seems like probably a good idea for a library. Requires a soname
    bump.

 configure.ac      |    4 ++--
 games/Makefile.am |    1 +
 2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index e626d43..675e5f6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@ dnl * If any interfaces have been removed or changed since the last public
 dnl   release, then set age to 0)
 dnl
 dnl http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-AC_SUBST([LIBGNOME_GAMES_SUPPORT_LT_VERSION], [2:4:0])
+AC_SUBST([LIBGNOME_GAMES_SUPPORT_LT_VERSION], [3:0:0])
 
 AC_SUBST([LIBGNOME_GAMES_SUPPORT_API_VERSION], [1])
 
@@ -26,7 +26,7 @@ AM_INIT_AUTOMAKE([1.11 no-dist-gzip dist-xz foreign subdir-objects])
 AM_SILENT_RULES([yes])
 AM_MAINTAINER_MODE([enable])
 
-AM_PROG_VALAC([0.24])
+AM_PROG_VALAC([0.39.6])
 
 LT_PREREQ([2.2])
 LT_INIT([disable-static])
diff --git a/games/Makefile.am b/games/Makefile.am
index 7bca713..10c0a1f 100644
--- a/games/Makefile.am
+++ b/games/Makefile.am
@@ -34,6 +34,7 @@ libgnome_games_support_@LIBGNOME_GAMES_SUPPORT_API_VERSION@_la_LIBADD = \
        $(GTK_LIBS)
 
 libgnome_games_support_@LIBGNOME_GAMES_SUPPORT_API_VERSION@_la_VALAFLAGS = \
+       --abi-stability                         \
        --pkg glib-2.0                          \
        --pkg gtk+-3.0                          \
        --pkg gio-2.0                           \