setter prefixes for SuperBuilder

setter prefixes for SuperBuilder [javac]
better javadoc for the SuperBuilder setterPrefix value
setter prefixes for SuperBuilder [ecj]
add test for SuperBuilder setter method customization
fix setter method customization with setterPrefix

test/transform/resource/before/SuperBuilderCustomizedWithSetterPrefix.java

@@ -0,0 +1,18 @@
+import java.util.List;
+
+public class SuperBuilderCustomizedWithSetterPrefix {
+	@lombok.experimental.SuperBuilder(setterPrefix = "set")
+	public static class Parent {
+		public static abstract class ParentBuilder<C extends Parent, B extends ParentBuilder<C, B>> {
+			public B setField1(int field1) {
+				this.field1 = field1 + 1;
+				return self();
+			}
+		}
+		int field1;
+	}
+	
+	public static void test() {
+		Parent x = Parent.builder().setField1(5).build();
+	}
+}