Upgrade systemd-boot to 237.
As systemd has dropped autotools support, fix configure and compile
failures related to meson.
(From OE-Core rev: 086308aa2a5e332de6f00ed397c4a55d132f158f)
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Chen Qi