[gnome-boxes] Makefile.am: honor ac_local flags

[Marc-Andre Lureau <malureau src gnome org>]

commit 6ff630e29f7c366ac30b608d64fa4434f64c1b3d
Author: Javier JardÃn <jjardon gnome org>
Date:   Fri Nov 25 00:05:39 2011 +0000

    Makefile.am: honor ac_local flags
    
    https://bugzilla.gnome.org/show_bug.cgi?id=664773

 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index ce42371..b61f58e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-ACLOCAL_AMFLAGS = -I m4
+ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
 NULL =
 
 SUBDIRS = data src po vapi