[gn] Fix v8_code_comment assertion

Change-Id: Ia553e38ca65587c16c36c736c2b9ca9b686ed3e5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2839561
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Auto-Submit: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74067}

BUILD.gn

@@ -334,7 +334,7 @@ if (v8_enable_v8_checks == "") {
   v8_enable_v8_checks = v8_enable_debugging_features
 }
 if (v8_enable_snapshot_code_comments) {
-  assert(v8_code_comments || v8_code_comments == "",
+  assert(v8_code_comments == true || v8_code_comments == "",
          "v8_enable_snapshot_code_comments conflicts with v8_code_comments.")
   v8_code_comments = true
 } else if (v8_code_comments == "") {