Test equals/hashCode/toString for function references

compiler/testData/codegen/boxWithStdlib/reflection/methodsFromAny/functionToString.kt

@@ -0,0 +1,24 @@
+package test
+
+import kotlin.test.assertEquals
+
+fun top() = 42
+
+fun String.ext(): Int = 0
+fun IntRange?.ext2(): Array<Int?> = arrayOfNulls(0)
+
+class A {
+    fun mem(): String = ""
+}
+
+fun assertToString(s: String, x: Any) {
+    assertEquals(s, x.toString())
+}
+
+fun box(): String {
+    assertToString("fun top(): kotlin.Int", ::top)
+    assertToString("fun kotlin.String.ext(): kotlin.Int", String::ext)
+    assertToString("fun kotlin.IntRange?.ext2(): kotlin.Array<kotlin.Int?>", IntRange::ext2)
+    assertToString("fun test.A.mem(): kotlin.String", A::mem)
+    return "OK"
+}