[llvm] Support big endian in llvm-symbolizer's data location dwarf info parser (PR #67284)

[James Henderson via llvm-commits]

jh7370 wrote:

I've added a couple of colleagues who are more familiar with the details of the DWARF standard and library than me, as I don't think my knowledge in this area is strong enough to review the change.

Also, the functional change is in the DWARFDebugInfo library, not in the symbolizer code, so the test really belongs with the tests for that library, not with the llvm-symbolizer tool tests.

https://github.com/llvm/llvm-project/pull/67284