There is uncertainty about the default branch name in git going forward.
To try and cover the different possible outcomes, add branch names to all
git:// and gitsm:// SRC_URI entries.
This update was made with the script added to contrib in this patch which
aims to help others convert other layers.
(From OE-Core rev: b51c405faf6f8c0365f7533bfaf470d79152a463)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
