This test changes the global locale, but wasn't changing the locale back
to the original locale, which was messing up tests that followed.

Bug: 943140
Change-Id: I0abacbd4a724538c9dbe5cb61ef1854ca79a76e4
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1531539
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>