Apple: Detect missing bundle identifier when using location permissions

The location permissions database in /var/db/locationd/clients.plist
ties the location permission to the bundle identifier (among other
things), so a missing bundle identifier will result in the app asking
repeatedly for the location permission, as the permission is never
saved.

Pick-to: 6.5
Change-Id: I64ab5b8f8762804869c0f97debd97da817787808
Reviewed-by: Juha Vuolle <juha.vuolle@qt.io>

src/corelib/platform/darwin/qdarwinpermissionplugin_location.mm

@@ -66,6 +66,13 @@ struct PermissionRequest
 
 - (Qt::PermissionStatus)authorizationStatus:(QLocationPermission)permission
 {
+    NSString *bundleIdentifier = NSBundle.mainBundle.bundleIdentifier;
+    if (!bundleIdentifier || !bundleIdentifier.length) {
+        qCWarning(lcLocationPermission) << "Missing bundle identifier"
+            << "in Info.plist. Can not use location permissions.";
+        return Qt::PermissionStatus::Denied;
+    }
+
     switch ([self authorizationStatus]) {
     case kCLAuthorizationStatusRestricted:
     case kCLAuthorizationStatusDenied: