[logback] Add log4j as a BuildRequirement (for examples)

[mef]

commit 244a4e3fd1193e7cda9f071815fdeb5f8c086e8c
Author: Mary Ellen Foster <mefoster at gmail.com>
Date:   Wed Jul 11 15:00:36 2012 +0100

    Add log4j as a BuildRequirement (for examples)

 logback.spec |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/logback.spec b/logback.spec
index d20639d..bf3e093 100644
--- a/logback.spec
+++ b/logback.spec
@@ -31,6 +31,7 @@ BuildRequires:	tomcat-lib
 BuildRequires:	javamail
 BuildRequires:	apache-commons-cli
 BuildRequires:	antlr-tool
+BuildRequires:  log4j
 
 # Build tools -- build with ant for now because of circular dependencies
 BuildRequires:	ant