Minor, add test for obsolete issue on "actual missing" error

#KT-20142

compiler/testData/diagnostics/tests/multiplatform/headerClass/actualMissing.kt

@@ -0,0 +1,14 @@
+// !LANGUAGE: +MultiPlatformProjects
+// MODULE: m1-common
+// FILE: common.kt
+
+expect class A {
+    fun foo()
+}
+
+// MODULE: m1-jvm(m1-common)
+// FILE: jvm.kt
+
+class <!ACTUAL_MISSING!>A<!> {
+    actual fun foo() {}
+}

compiler/testData/diagnostics/tests/multiplatform/headerClass/actualMissing.txt

@@ -0,0 +1,22 @@
+// -- Module: <m1-common> --
+package
+
+public final expect class A {
+    public constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final expect fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+
+// -- Module: <m1-jvm> --
+package
+
+public final class A {
+    public constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final actual fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}