Write generic signature for autogenerated toArray

#KT-14195 Fixed

compiler/testData/codegen/box/collections/toArrayInJavaClass.kt

@@ -0,0 +1,32 @@
+// WITH_RUNTIME
+// FILE: B.java
+public class B<E> extends A<E> {
+    @Override
+    public <T> T[] toArray(T[] a) {
+        return a;
+    }
+}
+
+// FILE: main.kt
+open class A<T> : Collection<T> {
+    override val size: Int
+        get() = TODO("not implemented") //To change initializer of created properties use File | Settings | File Templates.
+
+    override fun contains(element: T): Boolean {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun containsAll(elements: Collection<T>): Boolean {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun isEmpty(): Boolean {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun iterator(): Iterator<T> {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+}
+
+fun box() = B<String>().toArray(arrayOf("OK"))[0]