[clang] [lldb] clang: Do not overwrite a module's DataLayout in the backend (PR #224012)

[Douglas Yung via cfe-commits]

dyung wrote:

@arsenm I think the test PR44896.ll probably needs a REQUIRES line now since it is explicitly using an x86 triple.

https://lab.llvm.org/buildbot/#/builders/190/builds/50116

https://github.com/llvm/llvm-project/pull/224012