Partially fix Java interop for emitted inner classes

compiler/src/dotty/tools/backend/jvm/DottyBackendInterface.scala

@@ -560,7 +560,10 @@ class DottyBackendInterface(outputDirectory: AbstractFile, val superCallsMap: Ma
     def javaBinaryName: Name = toDenot(sym).fullNameSeparated("/") // addModuleSuffix(fullNameInternal('/'))
     def javaClassName: String = toDenot(sym).fullName.toString// addModuleSuffix(fullNameInternal('.')).toString
     def name: Name = sym.name
-    def rawname: Name = sym.name // todo ????
+    def rawname: Name = {
+      val original = toDenot(sym).initial
+      sym.name(ctx.withPhase(original.validFor.phaseId))
+    }
 
     // types
     def info: Type = toDenot(sym).info

tests/pos-java-interop/innerClass/Outer.scala

@@ -0,0 +1,8 @@
+class Outer {
+  class InnerInClass
+
+  def inner() = new InnerInClass
+}
+object Outer {
+  class InnerInObject
+}

tests/pos-java-interop/innerClass/Test.java

@@ -0,0 +1,9 @@
+public class Test {
+  public static void test() {
+    Outer outer = new Outer();
+    Outer.InnerInClass innerInClass = outer.inner();
+
+    // Does not work yet, requires https://github.com/DarkDimius/scala/pull/4
+    // Outer.InnerInObject innerInObject = new Outer.InnerInObject();
+  }
+}