Add new tests for default lambda inlining

compiler/testData/codegen/boxInline/defaultValues/lambdaInlining/privateFunctionReference.kt

@@ -0,0 +1,18 @@
+// FILE: 1.kt
+// LANGUAGE_VERSION: 1.2
+// SKIP_INLINE_CHECK_IN: inlineFun$default
+package test
+
+private fun ok() = "OK"
+
+internal inline fun inlineFun(lambda: () -> String = ::ok): String {
+    return lambda()
+}
+
+// FILE: 2.kt
+
+import test.*
+
+fun box(): String {
+    return inlineFun()
+}