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

compiler/testData/diagnostics/tests/multimodule/duplicateClass/duplicateClass.fir.kt

@@ -0,0 +1,32 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+// MODULE: m1
+// FILE: a.kt
+
+package p
+
+public class A
+public class B {
+    public val a: A = A()
+}
+
+// MODULE: m2
+// FILE: b.kt
+
+package p
+
+public class A {
+    val x = 1
+}
+
+public fun foo(a: A) {
+    a.x + 1
+}
+
+// MODULE: m3(m1, m2)
+// FILE: b.kt
+
+import p.*
+
+fun test() {
+    foo(B().a)
+}