FL-1648: Correct dev-libs/libgit2-glib RDEPEND for dev-vcs/gitg
FL-1648: Cleanup and update dev-libs/libgit2-glib

- Removes 0.0.12
- Stabilizes 0.0.22
FL-1648: Fork dev-libs/libgit2

- Removes <0.0.21.1
- Mirrors and stabilizes 0.21.1