[bug 1088492] Stop redirecting campaign page to Mozilla Taiwan website

* Prevents redirecting the 10th anniversary campaign page to Mozilla Taiwan website.
* Also prevents redirects for /firefox/os/devices/, /firefox/tiles/ and /firefox/android/ (as noted in the bug)

We should probably tidy up & consolidate these redirects at some point, but in the interest of getting this one out I'll keep it simple for now.