resign_firmwarefd: Correct output file name for VBLOCK B.

In commit https://chromium-review.googlesource.com/203682 the output file names
were always vblock_A, and should be changed to vblock_A and vblock_B.

BUG=chrome-os-partner:30611
TEST=Signed a recovery image and checked output.
BRANCH=none

Change-Id: I91901ba2c24032c6af3e6ab3f731bb7dd384ae2d
Reviewed-on: https://chromium-review.googlesource.com/208610
Tested-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
1 file changed