[webOS] Read timezone from webOS location

The jail only mounts /etc/localtime which is a symlink to /var/luna/preferences/localtime. In this case parsing the timezone from the symlink fails. Fortunately, there is a debian like file /var/luna/preferences/timezone

xbmc/platform/posix/PosixTimezone.cpp

@@ -202,6 +202,10 @@ std::string CPosixTimezone::GetOSConfiguredTimezone()
   // try Slackware approach first
   timezoneName = ReadFromLocaltime("/etc/localtime-copied-from");
 
+  // then check for webOS
+  if (timezoneName.empty())
+    timezoneName = ReadFromLocaltime("/var/luna/preferences/localtime");
+
   // RHEL and maybe other distros make /etc/localtime a symlink
   if (timezoneName.empty())
     timezoneName = ReadFromLocaltime("/etc/localtime");