[ostree] configure: Use AC_PROG_LIBTOOL

[Colin Walters <walters src gnome org>]

commit 37bea9f29d50e00e53ca6d0f755340f1347179f8
Author: Colin Walters <walters verbum org>
Date:   Wed Oct 26 13:52:42 2011 -0400

    configure: Use AC_PROG_LIBTOOL
    
    This apparently helps autoreconf know we're using libtool.

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c1e5eb5..c487ff1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,6 +25,7 @@ fi
 changequote([,])dnl
 
 # Initialize libtool
+AC_PROG_LIBTOOL
 LT_PREREQ([2.2])
 LT_INIT