Initial add for MachO support for yaml2obj

Adding the initial files for adding MachO support to yaml2obj. Passing a MachO file will result in an error.

I will be implementing obj2yaml and yaml2obj for MachO in parallel so that one can be used to test the other.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@269244 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed