Add clean-dist target (useful for Hudson)
Add clean-dist target (useful for Hudson)

git-svn-id: https://svn.apache.org/repos/asf/jakarta/jmeter/trunk@617837 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 63b454fa01d6e8ade995a290d4bfc1cea3db05ec
ham1/jmeter,benbenw/jmeter,benbenw/jmeter,apache/jmeter,etnetera/jmeter,ham1/jmeter,benbenw/jmeter,ham1/jmeter,benbenw/jmeter,ham1/jmeter,etnetera/jmeter,etnetera/jmeter,apache/jmeter,etnetera/jmeter,apache/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter,etnetera/jmeter