Fixes [YOCTO #15222]
In some situations its more practical to keep git configuration
at `/etc/gitconfig` instead of `$HOME/.gitconfig` (e.g., when mounting
git configuration into a docker container).
This change makes `devtool upgrade` consider any available
git configuration instead of only checking `--global`.
(From OE-Core rev: 30a9f7de45050c8bac49d4b37419cc2e067a75fa)
Signed-off-by: Marcus Flyckt <marcus.flyckt@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
561c63e947