[DynInst_API:] [dyninst/dyninst] 1838c8: common: include ostream in IBSTree.h

[Josh Stone <jistone@xxxxxxxxxx>]

  Branch: refs/heads/master
  Home:   https://github.com/dyninst/dyninst
  Commit: 1838c82e65ec244018c2892d725cac092621fa9b
      https://github.com/dyninst/dyninst/commit/1838c82e65ec244018c2892d725cac092621fa9b
  Author: Josh Stone <jistone@xxxxxxxxxx>
  Date:   2016-11-04 (Fri, 04 Nov 2016)

  Changed paths:
    M common/h/IBSTree.h

  Log Message:
  -----------
  common: include ostream in IBSTree.h

It's needed to solve this error with GCC 6.2:

common/h/IBSTree.h:138:32: error: âendlâ is not a member of âstdâ
   stream << node.val_ << std::endl;
                          ^~~