spec: The licence is actually GPLv2+

The licence is actually GPLv2+ so put that in the specfile.

Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/redhat/cachefilesd.spec b/redhat/cachefilesd.spec
index 814dbcb..ecc2d82 100644
--- a/redhat/cachefilesd.spec
+++ b/redhat/cachefilesd.spec
@@ -5,7 +5,7 @@
 Release:	1%{?dist}%{?buildid}
 Summary:	CacheFiles user-space management daemon
 Group:		System Environment/Daemons
-License:	GPLv2
+License:	GPLv2+
 URL:		http://people.redhat.com/~dhowells/fscache/
 Source0:	http://people.redhat.com/dhowells/fscache/cachefilesd-%{version}.tar.bz2