Add %{dist} tag to differentiate RPM distributions and releases

Note that an additional Release field is not necessary for the devel package
as it will follow the primary Release field. For more information on the dist
tag, see http://fedoraproject.org/wiki/Packaging:DistTag

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>

lxc.spec.in

@@ -22,7 +22,7 @@
 
 Name: @PACKAGE@
 Version: @VERSION@
-Release: 1
+Release: 1%{?dist}
 URL: http://lxc.sourceforge.net
 Source: http://dl.sourceforge.net/sourceforge/%{name}/%{name}-%{version}.tar.gz
 Summary: %{name} : Linux Container
@@ -52,7 +52,6 @@ Group:          System Environment/Libraries
 The %{name}-libs package contains libraries for running %{name} applications.
 
 %package devel
-Release: 1
 Summary: development library for %{name}
 Group: Development/Libraries