Provide "equals" and "hashCode" for reflection objects

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

@@ -0,0 +1,29 @@
+import kotlin.test.*
+
+val top = 42
+var top2 = -23
+
+val Int.intExt: Int get() = this
+val Char.charExt: Int get() = this.toInt()
+
+class A(var mem: String)
+class B(var mem: String)
+
+
+fun checkEqual(x: Any, y: Any) {
+    assertEquals(x, y)
+    assertEquals(x.hashCode(), y.hashCode(), "Elements are equal but their hash codes are not: ${x.hashCode()} != ${y.hashCode()}")
+}
+
+fun box(): String {
+    checkEqual(::top, ::top)
+    checkEqual(::top2, ::top2)
+    checkEqual(Int::intExt, Int::intExt)
+    checkEqual(A::mem, A::mem)
+
+    assertFalse(::top == ::top2)
+    assertFalse(Int::intExt == Char::charExt)
+    assertFalse(A::mem == B::mem)
+
+    return "OK"
+}