[llvm-readobj] Install llvm-readelf alias

Install an llvm-readelf symlink to llvm-readobj.
When invoked as *readelf*, default to -elf-output-style=GNU.

Patch by Roland McGrath

Differential Revision: https://reviews.llvm.org/D33869

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308408 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed