[java] added unit test of do-while for AvoidArrayLoops

pmd-java/src/test/resources/net/sourceforge/pmd/lang/java/rule/performance/xml/AvoidArrayLoops.xml

@@ -48,6 +48,22 @@ public class Foo {
         ]]></code>
     </test-code>
 
+    <test-code>
+        <description>copy via do-while loop</description>
+        <expected-problems>1</expected-problems>
+        <code><![CDATA[
+public class Foo {
+    public void bar() {
+        int i = 0;
+        do {
+            a[i] = b[i];
+            i++;
+        } while (i < 10);
+    }
+}
+        ]]></code>
+    </test-code>
+
     <test-code>
         <description>copy involving multiple arrays is ok</description>
         <expected-problems>0</expected-problems>