Marking test cases with @expectedFailureLinux as per recently opened bugs
- PR 15038: missing wide char support on Linux
- PR 14600 - Exception state registers not supported on Linux
- PR 15039: SBProcess.GetSTDOUT() returns an empty buffer
- PR 15037: stop-hooks sometimes fail to fire on Linux



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@173363 91177308-0d34-0410-b5e6-96231b3b80d8