Install the aclocal macros for use by Winelib apps.

diff --git a/aclocal.m4 b/aclocal.m4
index af46003..2c9692c 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -16,6 +16,11 @@
 dnl License along with this library; if not, write to the Free Software
 dnl Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 dnl
+dnl As a special exception to the GNU Lesser General Public License,
+dnl if you distribute this file as part of a program that contains a
+dnl configuration script generated by Autoconf, you may include it
+dnl under the same distribution terms that you use for the rest of
+dnl that program.
 
 dnl **** Get the ldd program name; used by WINE_GET_SONAME ****
 dnl