[build] eclipse test target for Javac8 fixed

javac8 has a bizarre dependency situation: we need the stubs in src/stubs there to compile, but if they are there
at runtime during a test run of javac8, they take precedence over the JDK's javac (because we include this
as a separate cp entry, and thus it is not a bootclasspath item), and messes everything up.
The fix is to tell eclipse to compile various src/X folders to different 'bin' targets, which required
an update to ivyplusplus as well.

also it was just broken in general, fixed that too :)

buildScripts/setup.ant.xml

@@ -106,7 +106,7 @@ This buildfile is part of projectlombok.org. It sets up the build itself.
 	
 	<target name="-ipp.load" depends="-ipp.download">
 		<taskdef classpath="lib/ivyplusplus.jar" resource="com/zwitserloot/ivyplusplus/antlib.xml" uri="antlib:com.zwitserloot.ivyplusplus" />
-		<ivy:ensureippversion version="1.36" property="ivyplusplus.minimumAvailable" />
+		<ivy:ensureippversion version="1.38" property="ivyplusplus.minimumAvailable" />
 	</target>
 	
 	<target name="-ipp.redownload" unless="ivyplusplus.minimumAvailable">