4c698207e3
Git may not be available, and this may not be a git checkout, as would
happen in a release tarball. Doesn't really attempt to get a nicer
version formatting if some of the git subcommands fail.
Change-Id: Ib568cd1310983a43f2664ded72528d7e41f554c0
[ROCm/clr commit: eb31e45123]