Add back lost tests from scala#444

Where did they disappear to?

Author: DarkDimius

tests/pos/vcblock.scala

@@ -0,0 +1,6 @@
+class Position(val foo: Int) extends AnyVal {
+  def thing(): Position = {
+    val y = new Position(1)
+    y
+  }
+}

tests/pos/vcif.scala

@@ -0,0 +1,6 @@
+class Position(val foo: Int) extends AnyVal {
+  def thing(): Position = {
+    val y = new Position(1)
+    y
+  }
+}