[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/LocalClassAndShortSubpackageNames.fir.kt

@@ -0,0 +1,17 @@
+// FILE: A.kt
+package foo.bar
+
+class X
+
+// FILE: B.kt
+
+package foo
+
+fun f() {
+    class Local1 {
+        fun g() : bar.X? = null
+    }
+    class Local2 {
+        fun g() : foo.bar.X? = null
+    }
+}