Support class literals (A::class)

compiler/testData/diagnostics/testsWithStdLib/classLiteral/simpleClassLiteral.kt

@@ -0,0 +1,3 @@
+class A
+
+val k = A::class

compiler/testData/diagnostics/testsWithStdLib/classLiteral/simpleClassLiteral.txt

@@ -0,0 +1,10 @@
+package
+
+internal val k: kotlin.reflect.KClass<A>
+
+internal final class A {
+    public constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}