[llvm-readobj] Separate Symbol Version dumpers into LLVM style and GNU style
Currently, llvm-readobj can dump symbol version sections only in LLVM style. In this patch, I would like to separate these dumpers into GNU style and
LLVM style for future implementation.
Reviewers: grimar, jhenderson, mattd, rupprecht
Reviewed By: rupprecht
Differential Revision: https://reviews.llvm.org/D59186