fixing typo

testing-drivers/testsrc/org/aspectj/testing/drivers/HarnessSelectionTest.java

@@ -92,7 +92,7 @@ public class HarnessSelectionTest extends TestCase {
     }
 
     public void testIncrementalSuite() {
-        System.err.println("skippping testIncrementalSuite - too long");
+        System.err.println("skipping testIncrementalSuite - too long");
         if (true) return;
         if (!eclipseAvailable()) {
             System.err.println("skipping test - eclipse classes not available");