verstage should include the CBFS SPI wrapper, when configured

Vboot2 targets so far did not have COMMON_CBFS_SPI_WRAPPER
configuration option enabled, so the verstage is missing the relevant
files in some Makefiles. This patch fixes the problem.

BRANCH=none
BUG=none
TEST=with the rest of the patches applied cosmos target builds fine
     with COMMON_CBFS_SPI_WRAPPER enabled

Change-Id: I3ce78c8afc5f7d8ce822bbf8dd789c0c2ba4b99c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: b72693c96f7d8ce94ce6fe12b316d5b88fded579
Original-Change-Id: Iab813b9f5b0156c45b007fe175500ef0de50e65c
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/223751
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8772
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
2 files changed