[gnome-panel] build: add AC_CONFIG_AUX_DIR

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 63add511b6c94e35012a8375b97354e2f6e4887d
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Sep 26 04:38:37 2015 +0300

    build: add AC_CONFIG_AUX_DIR

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 40aed92..7606599 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,6 +21,7 @@ dnl **************************************************************************
 AC_INIT([gnome-panel], [gp_version], [gp_bugzilla_url])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_AUX_DIR([build-aux])
 
 dnl **************************************************************************
 dnl Initialize automake