Add second test case for sbt/sbt#2411

Thanks @smarter, see sbt/sbt#2416

sbt/src/sbt-test/source-dependencies/nested-case-class/changes/A1.scala

@@ -0,0 +1,13 @@
+package example
+
+class VC(val self: Int) extends AnyVal
+
+class A {
+  case class B(x: VC)
+  def c = B
+}
+object A {
+  def main(args: Array[String]): Unit = {
+    (new A).c
+  }
+}

sbt/src/sbt-test/source-dependencies/nested-case-class/test

@@ -1 +1,6 @@
+$ copy-file changes/A0.scala A.scala
+> run
+
+# The same test case, but involving value classes
+$ copy-file changes/A1.scala A.scala
 > run