devtool: upgrade: check that user has configured git properly
If user.name or user.email haven't been set then git rebase can't really
work properly. Check that the user has set these and error out if not.
(Elsewhere we are relying on OE's git patch functionality which forces
a dummy OE value - that's OK there as it's completely under OE's control
and therefore it's OK for a dummy OE user to be the committer, but here
the rebase may require intervention so it's reasonable to have the
user's actual name and email on the operation.)
Fixes [YOCTO #11947].
(From OE-Core rev:
129a3be07e272013be2db17552c13b4d8cc2cf6e)
Signed-off-by: paul <paul@peggleto-mobl.ger.corp.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
