Serialize/Deserialize const modifier

compiler/testData/loadJava/compiledKotlin/prop/Const.kt

@@ -0,0 +1,14 @@
+//ALLOW_AST_ACCESS
+package test
+
+const private val topLevel = 1
+
+object A {
+    const protected val inObject = 2
+}
+
+class B {
+    companion object {
+        const val inCompanion = 3
+    }
+}

compiler/testData/loadJava/compiledKotlin/prop/Const.txt

@@ -0,0 +1,20 @@
+package test
+
+private const val topLevel: kotlin.Int = 1
+    private fun <get-topLevel>(): kotlin.Int
+
+public object A {
+    /*primary*/ private constructor A()
+    protected const final val inObject: kotlin.Int = 2
+        protected final fun <get-inObject>(): kotlin.Int
+}
+
+public final class B {
+    /*primary*/ public constructor B()
+
+    public companion object Companion {
+        /*primary*/ private constructor Companion()
+        public const final val inCompanion: kotlin.Int = 3
+            public final fun <get-inCompanion>(): kotlin.Int
+    }
+}