[PM] Add the explicit copy, move, swap, and assignment boilerplate
required by MSVC 2013.

This also makes the repeating pass wrapper assignable. Mildly
unfortunate as it means we can't use a const member for the int, but
that is a really minor invariant to try to preserve at the cost of loss
of regularity of the type. Yet another annoyance of the particular C++
object / move semantic model.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277582 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed