[JS IR] Initialize enum fields before accessing them in companion object

see https://youtrack.jetbrains.com/issue/KT-43901

compiler/testData/codegen/box/enum/companionAccessingEnumValue.kt

@@ -0,0 +1,35 @@
+private var logs = ""
+
+enum class Foo(val text: String) {
+    FOO("foo"),
+    BAR("bar"),
+    PING("foo");
+
+    init {
+        logs += "${text}A;"
+    }
+
+    companion object {
+        init {
+            logs += "StatA;"
+        }
+        val first = values()[0]
+        init {
+            logs += "Stat${first.text};"
+        }
+    }
+
+    init {
+        logs += "${text}B;"
+    }
+}
+
+fun box(): String {
+    Foo.FOO
+
+    if (Foo.first !== Foo.FOO) return "FAIL 0: ${Foo.first}"
+
+    if (logs != "fooA;fooB;barA;barB;fooA;fooB;StatA;Statfoo;") return "FAIL 1: ${logs}"
+
+    return "OK"
+}