Update XFAIL

The latest clang in our tree now passes the below four tests:

    libc++ :: std/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong.pass.cpp
    libc++ :: std/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_strong_explicit.pass.cpp
    libc++ :: std/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak.pass.cpp
    libc++ :: std/atomics/atomics.types.operations/atomics.types.operations.req/atomic_compare_exchange_weak_explicit.pass.cpp

It however fails the below six:

    libc++ :: std/strings/string.view/string_view.literals/literal.pass.cpp
    libc++ :: std/strings/string.view/string_view.literals/literal1.pass.cpp
    libc++ :: std/strings/string.view/string_view.literals/literal2.pass.cpp
    libc++ :: std/strings/string.view/string_view.literals/literal3.pass.cpp
    libc++ :: std/strings/basic.string/string.cons/implicit_deduction_guides.pass.cpp
    libc++ :: std/strings/string.view/string.view.cons/implicit_deduction_guides.pass.cpp

Bug: 33278386
Bug: 36400049
Bug: 36401676
Test: ./run_tests.py
Change-Id: I24394534ba77ecbc2cdc682ac5e681baefb11c16
10 files changed