Merge pull request #3708 from dotty-staging/fix-#1370

Fix #1370: Add regression test

Author: odersky

compiler/test-resources/repl/i1370

@@ -0,0 +1,4 @@
+scala> object Lives { class Private { def foo1: Any = new Private.C1; def foo2: Any = new Private.C2 };  object Private { class C1 private {}; private class C2 {} } }
+1 | object Lives { class Private { def foo1: Any = new Private.C1; def foo2: Any = new Private.C2 };  object Private { class C1 private {}; private class C2 {} } }
+  |                                                    ^^^^^^^^^^
+  |constructor C1 cannot be accessed as a member of Lives.Private.C1 from class Private.