It seems like the default branch for coreboot's Memtest86+ fork was
renamed from 'master' to 'main'.
TEST: Memtest builds correctly when selecting 'Main' for the Memtest86+
version option.
Change-Id: I269249518019f5d0d12c57f1c14012abca86b48b
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76100
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>