Disabling test broken (on GCC buildbot) due to http://llvm.org/pr14637
- prompt disappears with older libedit versions
- will re-enable once we have a recent libedit on the buildbot in question



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@190889 91177308-0d34-0410-b5e6-96231b3b80d8