[libftdi] add missing BR

[Lucian Langa]

commit 2f1710950a74a88a193bcd4d482617a3fd148b7f
Author: Lucian Langa <lucilanga at gnome.org>
Date:   Sat Jun 18 08:57:57 2011 +0300

    add missing BR

 libftdi.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libftdi.spec b/libftdi.spec
index 2f724f2..6513114 100644
--- a/libftdi.spec
+++ b/libftdi.spec
@@ -15,7 +15,7 @@ Patch1:		libftdi-0.19-libusb.patch
 BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 BuildRequires:	libusb-devel, doxygen, boost-devel, python-devel, swig
-Requires:	pkgconfig, udev
+Requires:	pkgconfig, udev, autoconf
 Requires(pre):	shadow-utils