The XFAILs in r208840 were too general. They were meant to only apply
to testing when use_system_lib was set.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@209972 91177308-0d34-0410-b5e6-96231b3b80d8
When testing against the system library, there is a relatively minor
ABI breakage that the std::future_errc values have been changed to
avoid using zero. Update the tests that rely on the values being
consistent.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@208840 91177308-0d34-0410-b5e6-96231b3b80d8
