[BinaryFormat] Fix bitfield-ordering of MachO::relocation_info on big-endian.

Hopefully this will fix the JITLink regression test failures on big-endian
testers (e.g.
http://lab.llvm.org:8011/builders/clang-s390x-linux-lnt/builds/12702)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358839 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed