Support KCallable.call

#KT-2187 Fixed

compiler/testData/codegen/boxWithStdlib/reflection/call/equalsHashCodeToString.kt

@@ -0,0 +1,25 @@
+class A
+
+data class D(val s: String)
+
+fun box(): String {
+    val a = A()
+    assert(A::equals.call(a, a))
+    assert(!A::equals.call(a, 0))
+    assert(A::hashCode.call(a) == A::hashCode.call(a))
+    assert(A::toString.call(a).startsWith("A@"))
+
+    assert(D::equals.call(D("foo"), D("foo")))
+    assert(!D::equals.call(D("foo"), D("bar")))
+    assert(D::hashCode.call(D("foo")) == D::hashCode.call(D("foo")))
+    assert(D::toString.call(D("foo")) == "D(s=foo)")
+
+    assert(Int::equals.call(-1, -1))
+    assert(Int::hashCode.call(0) != Int::hashCode.call(1))
+    assert(Int::toString.call(42) == "42")
+
+    assert(String::equals.call("beer", "beer"))
+    String::hashCode.call("beer")
+
+    return String::toString.call("OK")
+}