- Make DSCallSite not inherit from std::vector. Renamed methods slightly.

  - Make DSCallSite not inherit from std::vector.  Renamed methods slightly.
    Make copy ctor have two versions to avoid dealing with conditional template
    argument.  DSCallSite ctor now takes all arguments instead of taking one
    and being populated later.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4240 91177308-0d34-0410-b5e6-96231b3b80d8