r313500 added a fix for undefined "___cxa_deleted_virtual" symbol.
Previous libcxx versions don't have the fix and corresponding test
should be failing.
rdar://problem/34521053
Reviewers: EricWF, mclow.lists, ahatanak
Reviewed By: ahatanak
Subscribers: mehdi_amini, cfe-commits
Differential Revision: https://reviews.llvm.org/D39776
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@317734 91177308-0d34-0410-b5e6-96231b3b80d8