fix the build root Daniel

* libxml.spec.in: fix the build root
Daniel

svn path=/trunk/; revision=3753
diff --git a/libxml.spec.in b/libxml.spec.in
index fd13511..324b12c 100644
--- a/libxml.spec.in
+++ b/libxml.spec.in
@@ -5,7 +5,7 @@
 License: MIT
 Group: Development/Libraries
 Source: ftp://xmlsoft.org/libxml2-%{version}.tar.gz
-BuildRoot: %{_tmppath}/%{name}-%{version}-root
+BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
 BuildRequires: python python-devel zlib-devel
 URL: http://xmlsoft.org/
 Prefix: %{_prefix}