Fixed Fernflower decompiler output for generic nested types (IDEA-141230)

https://github.com/JetBrains/intellij-community/pull/273

testData/results/TestParameterizedTypes.dec

@@ -0,0 +1,11 @@
+package pkg;
+
+public abstract class TestParameterizedTypes<P> {
+   abstract TestParameterizedTypes<P>.Inner<String> getUnspecificInner();
+
+   abstract TestParameterizedTypes<Number>.Inner<String> getSpecificInner();
+
+   public abstract class Inner<I> {
+   }
+}
+

testData/src/pkg/TestParameterizedTypes.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2000-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package pkg;
+
+public abstract class TestParameterizedTypes<P> {
+
+  public abstract class Inner<I> { }
+
+  abstract Inner<String> getUnspecificInner();
+
+  abstract TestParameterizedTypes<Number>.Inner<String> getSpecificInner();
+
+}