[DebugInfo] Fix LineTest byteswap for cross-targeting builds
Summary:
The byte swap fix for big endian hosts in
9782c922cb21 (for D81570)
swaps based on the host endianess, but for cross-targeting builds (i.e.
big endian host targeting little endian) the host-endianess won't
necessarily match the generated DWARF. This change updates the test
to use symmetrical constants so the results aren't endian dependent.
Reviewers: jhenderson, hubert.reinterpretcast, stevewan, ikudrin
Reviewed By: ikudrin
Subscribers: ikudrin, aprantl, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D82827