Bitbake fetcher latest_versionstring now returns a tuple with (version,
revision) that helps SCM's like git to build current upstream version.
[YOCTO #7605]
(From OE-Core rev: 7ede979950fd265026c74526d8448627fd0a8c08)
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>