Safe identifier for the case of no name in PSI moved to 'descriptors' module, to be used in 'descriptor.loader.java'

compiler/testData/diagnostics/tests/recovery/namelessInJava.kt

@@ -0,0 +1,17 @@
+// FILE: p/Nameless.java
+
+package p;
+
+public class Nameless {
+    void () {}
+    int ;
+}
+
+// FILE: k.kt
+
+import p.*
+
+class K : Nameless() {
+    fun<!SYNTAX!><!> () {}
+    val<!SYNTAX!><!> : Int = 1
+}