Under libcpp-no-exceptions, noexcept is trivially true. Some tests expect in the usual setting to return false, so adjust them to expect true under libcpp-no-exceptions. Differential Revision: https://reviews.llvm.org/D27310 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@288660 91177308-0d34-0410-b5e6-96231b3b80d8