Mark 9 lldb unit tests for ubuntu as XFAIL.

The following lldb unit tests fail check-lldb on ubuntu:

TestDataFormatterStdMap.py
TestDataFormatterStdVBool.py
TestDataFormatterStdVector.py
TestDataFormatterSynthVal.py
TestEvents.py
TestInitializerList.py
TestMemoryHistory.py
TestReportData.py
TestValueVarUpdate.py

These unit test failures are for non-core functionality. The intent is to
reduce the check-lldb FAILS to core functionality FAILS and then circle
back later and fix these FAILS at a later date.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@222608 91177308-0d34-0410-b5e6-96231b3b80d8