[autoconf-archive/el5] fix %prep for xz extraction

[tmatsuu]

commit de06f5d027d19cfd6afd33014cb70540f2b05cd9
Author: Takanori MATSUURA <t.matsuu at gmail.com>
Date:   Sat Aug 6 01:09:28 2011 +0900

    fix %prep for xz extraction

 autoconf-archive.spec |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/autoconf-archive.spec b/autoconf-archive.spec
index d513231..46adc39 100644
--- a/autoconf-archive.spec
+++ b/autoconf-archive.spec
@@ -20,7 +20,8 @@ GNU Autoconf that have been contributed as free software by friendly
 supporters of the cause from all over the Internet.
 
 %prep
-%setup -q
+xzcat %{SOURCE0} | tar -xf -
+%setup -qDT
 
 %build
 %configure