Fix locale being reset to default after ShCompileTest.DecimalSepLocale
Fix locale being reset to default after ShCompileTest.DecimalSepLocale

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 <682bdb9e7d8ba359ef169b8db374e7a99d394a46@google.com>
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>

ppy/angle,ppy/angle,ppy/angle,ppy/angle