KT-2752: fix support of typealiases

compiler/testData/diagnostics/testsWithJsStdLib/name/classAndTypealias.kt

@@ -0,0 +1,5 @@
+package foo
+
+@JsName("B") class A(val x: Int)
+
+typealias B = A

compiler/testData/diagnostics/testsWithJsStdLib/name/classAndTypealias.txt

@@ -0,0 +1,13 @@
+package
+
+package foo {
+
+    @kotlin.js.JsName(name = "B") public final class A {
+        public constructor A(/*0*/ x: kotlin.Int)
+        public final val x: kotlin.Int
+        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
+    }
+    public typealias B = foo.A
+}