So far, existence of `git-lfs` was only checked during unpacking. As the
binary is also used in earlier steps also check for its existence there.
Additionally, factor out the LFS existence check into a dedicated
function and call it wherever git-lfs is used for the first time.
(Bitbake rev: 5818367db9b261b7e07c347d38044e6cba8f9727)
Signed-off-by: Philip Lorenz <philip.lorenz@bmw.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
7642477dc8