dev-vcs/cli: Add 9999 and misc cleanups

dev-vcs/cli: Add 9999 and misc cleanups

- Added 9999 live ebuild
- Removed unused eclass
- Added missing licenses
- Use default src_test since it is sufficient
- Add "v" prefix to GH_VERSION to be consistent with upstream builds
- Fix --version by setting LDFLAGS env var instead of Makefile var

Closes: https://bugs.gentoo.org/711998
Closes: https://github.com/gentoo/gentoo/pull/14870
Package-Manager: Portage-2.3.84, Repoman-2.3.20
Signed-off-by: Lucian Poston <lucianposton@pm.me>
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>