[FIR] Add initialization of calleeReference for FirAnnotationCall

compiler/fir/tree/src/org/jetbrains/kotlin/fir/references/impl/FirReferenceForUnresolvedAnnotations.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.fir.references.impl
+
+import org.jetbrains.kotlin.fir.FirSourceElement
+import org.jetbrains.kotlin.fir.references.FirReference
+import org.jetbrains.kotlin.fir.visitors.FirTransformer
+import org.jetbrains.kotlin.fir.visitors.FirVisitor
+
+object FirReferenceForUnresolvedAnnotations : FirReference() {
+    override val source: FirSourceElement?
+        get() = null
+
+    override fun <R, D> acceptChildren(visitor: FirVisitor<R, D>, data: D) {}
+
+    override fun <D> transformChildren(transformer: FirTransformer<D>, data: D): FirReference {
+        return this
+    }
+}

compiler/fir/tree/src/org/jetbrains/kotlin/fir/references/impl/FirReferencePlaceholderForResolvedAnnotations.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.fir.references.impl
+
+import org.jetbrains.kotlin.fir.FirSourceElement
+import org.jetbrains.kotlin.fir.references.FirReference
+import org.jetbrains.kotlin.fir.visitors.FirTransformer
+import org.jetbrains.kotlin.fir.visitors.FirVisitor
+
+object FirReferencePlaceholderForResolvedAnnotations : FirReference() {
+    override val source: FirSourceElement?
+        get() = null
+
+    override fun <R, D> acceptChildren(visitor: FirVisitor<R, D>, data: D) {}
+
+    override fun <D> transformChildren(transformer: FirTransformer<D>, data: D): FirReference {
+        return this
+    }
+}