Pass LC_ALL_MASK to newlocale

Pass LC_ALL_MASK to newlocale

This change fixes an issue with GrAutoLocaleSetter, which was
using the C library LC_ALL mask with newlocale. Instead the
xlocale LC_ALL_MASK should be used (these do not match on all
platforms).

See: http://man7.org/linux/man-pages/man3/newlocale.3.html

Bug: 711683
Change-Id: I6dba140e72b095f75667f0dcc98480d8d4562191
Reviewed-on: https://skia-review.googlesource.com/13601
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>