[libcxx] Remove shared_ptr::make_shared

    Summary: This patch removes `shared_ptr::make_shared` as it is not part of the standard. This patch also adds __create_with_cntrl_block, which is a help function that can be used in std::allocate_shared and std::make_shared. This is the third patch (out of 4) from D66178.

    Reviewers: EricWF, mclow.lists, ldionne

    Subscribers: christof, dexonsmith, libcxx-commits

    Tags: #libc

    Differential Revision: https://reviews.llvm.org/D68805

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@375504 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed