Revert "unique_ptrify LiveRange::segmentSet"

GCC 4.7 *shakes fist* (doesn't have std::map::emplace... )

This reverts commit r231168.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231173 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed