Kotlin: Tweak comments test

The top comment now gets owned by the Compilation Unit. We could
explicitly stop this from happening instead, but I think it's
reasonable.

Author: igfoo

java/ql/test-kotlin2/library-tests/comments/comments.expected

@@ -1,5 +1,5 @@
 comments
-| comments.kt:1:1:1:25 | /** Kdoc with no owner */ | /** Kdoc with no owner */ |
+| comments.kt:1:1:1:36 | /** Kdoc owned by CompilationUnit */ | /** Kdoc owned by CompilationUnit */ |
 | comments.kt:4:1:11:3 | /**\n * A group of *members*.\n *\n * This class has no useful logic; it's just a documentation example.\n *\n * @property name the name of this group.\n * @constructor Creates an empty group.\n */ | /**\n * A group of *members*.\n *\n * This class has no useful logic; it's just a documentation example.\n *\n * @property name the name of this group.\n * @constructor Creates an empty group.\n */ |
 | comments.kt:14:5:16:7 | /**\n     * Members of this group.\n     */ | /**\n     * Members of this group.\n     */ |
 | comments.kt:19:5:22:7 | /**\n     * Adds a [member] to this group.\n     * @return the new size of the group.\n     */ | /**\n     * Adds a [member] to this group.\n     * @return the new size of the group.\n     */ |
@@ -16,7 +16,7 @@ comments
 | comments.kt:79:9:81:11 | /**\n         * A local function comment\n         */ | /**\n         * A local function comment\n         */ |
 | comments.kt:88:10:90:11 | /**\n         * An anonymous object comment\n         */ | /**\n         * An anonymous object comment\n         */ |
 commentOwners
-| comments.kt:1:1:1:25 | /** Kdoc with no owner */ | comments.kt:0:0:0:0 | comments |
+| comments.kt:1:1:1:36 | /** Kdoc owned by CompilationUnit */ | comments.kt:0:0:0:0 | comments |
 | comments.kt:4:1:11:3 | /**\n * A group of *members*.\n *\n * This class has no useful logic; it's just a documentation example.\n *\n * @property name the name of this group.\n * @constructor Creates an empty group.\n */ | comments.kt:12:1:31:1 | Group |
 | comments.kt:14:5:16:7 | /**\n     * Members of this group.\n     */ | comments.kt:17:5:17:46 | getMembers$private |
 | comments.kt:14:5:16:7 | /**\n     * Members of this group.\n     */ | comments.kt:17:5:17:46 | members |

java/ql/test-kotlin2/library-tests/comments/comments.kt

@@ -1,4 +1,4 @@
-/** Kdoc with no owner */
+/** Kdoc owned by CompilationUnit */
 package foo.bar
 
 /**