Report error on native declaration with a body

compiler/testData/diagnostics/testsWithStdLib/native/body.kt

@@ -0,0 +1,25 @@
+import kotlin.jvm.*
+
+<!NATIVE_DECLARATION_CANNOT_HAVE_BODY!>native fun foo()<!> {}
+
+class C {
+    <!NATIVE_DECLARATION_CANNOT_HAVE_BODY!>native fun foo()<!> {}
+
+    class object {
+        <!NATIVE_DECLARATION_CANNOT_HAVE_BODY!>native fun foo()<!> {}
+    }
+}
+
+object O {
+    <!NATIVE_DECLARATION_CANNOT_HAVE_BODY!>native fun foo()<!> {}
+}
+
+fun test() {
+    class Local {
+        <!NATIVE_DECLARATION_CANNOT_HAVE_BODY!>native fun foo()<!> {}
+    }
+
+    object {
+        <!NATIVE_DECLARATION_CANNOT_HAVE_BODY!>native fun foo()<!> {}
+    }
+}

compiler/testData/diagnostics/testsWithStdLib/native/body.txt

@@ -0,0 +1,36 @@
+package
+
+kotlin.jvm.native() internal fun foo(): kotlin.Unit
+internal fun test(): kotlin.Unit
+
+internal final class C {
+    public constructor C()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    kotlin.jvm.native() internal final fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    internal class object <class-object-for-C> {
+        private constructor <class-object-for-C>()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        kotlin.jvm.native() internal final fun foo(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+internal object O {
+    private constructor O()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    kotlin.jvm.native() internal final fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public class object <class-object-for-O> : O {
+        private constructor <class-object-for-O>()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        kotlin.jvm.native() internal final override /*1*/ /*fake_override*/ fun foo(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}