Use bfd as the linker to build vboot_reference.
Use bfd as the linker to build vboot_reference.

Coreboot uses vboot_reference to build futility as a host binary.
However, it passes a target path for linking which causes LLD to
error out.
e.g. x86_64-pc-linux-clang -L/build/veyron_minnie/usr/lib
where -L/build/veyron_minnie/usr/lib should not be passed
as futility is being linked as a host binary.

Use bfd as the linker temporarily as it only produces a warning
and does not error out.

BUG=chromium:999217
TEST=coreboot builds
BRANCH=None

Change-Id: I8716ff3a0b4cc8afc54a3cc95ca5c1bfdcba6c9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1789676
Tested-by: Manoj Gupta <1d49d0f302d724a1dc5fc4d717d15418e9808ddd@chromium.org>
Reviewed-by: Julius Werner <4d12f06cff3725783b352157673a720bc67c4afe@chromium.org>
Commit-Queue: Manoj Gupta <1d49d0f302d724a1dc5fc4d717d15418e9808ddd@chromium.org>

coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot