[libcxx] Blind attempt to fix harmless leak in nodiscard_extensions.pass.cpp test

libcxx-libcxxabi-x86_64-linux-ubuntu-asan complains about a leak here.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@342814 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed