[ORC] Use explicit constructor calls to fix a builder error at
http://lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/17627

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@324411 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed