lldb check-in seems to break unit test on ubuntu

the following lldb check-in seems to break TestDisassembleRawData.py on ubuntu/clang:

commit 20f751cf409598a35a6882c08ba46d105c015ab2
Author: Rafael Espindola <rafael.espindola@gmail.com>

Use llvm::StringRefMemoryObject NFC.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@221509 91177308-0d34-0410-b5e6-96231b3b80d8

ninja check-lldb gives the following output:

FAIL: LLDB (clang -Qunused-arguments -fcolor-diagnostics-x86_64) :: test_disassemble_raw_data (TestDisassembleRawData.DisassembleRawDataTestCase)