Revert "Makefile: Build futility without utillib to extend arch support"
Revert "Makefile: Build futility without utillib to extend arch support"

This reverts commit f59d2e41977032f8f3eac113358b93574fc27b4f.

The change breaks 'make runtests'.  More specifically, 'make runfutiltests'.

Also, fix the duplicate FWLIB20 in LDLIBS when linking futility.

BUG=None
BRANCH=None
TEST=make runtests (more specifically, make runfutiltests)

Change-Id: Ia079924a814d98e1a3937b8de6ade7b001ff70ef
Signed-off-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/832848

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