Fix locale test data for GLIBC 2.27 and newer.

GLIBC 2.27 changed the locale data for fr_FR and ru_RU. In particular
they change the decimal and thousands separators used. This patch
makes the locale tests tolerate the updated locales.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@329143 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed