saft: Fix bug that the offset of the ecbin should be 4-byte aligned

The main firmware RW body is concatenated from u-boot, dtb, and ecbin.
They are all 4-byte aligned. This CL is to fix this bug.

BUG=chrome-os-partner:12997
TEST=After merging some EC update test changes, run:
run_remote_test.sh -a "new_ec=ec_autest_image.bin" firmware_UpdateECBin/control$

Change-Id: Ie906e191d37c743b9a28a1b55b4879c963648828
Reviewed-on: https://gerrit.chromium.org/gerrit/31708
Reviewed-by: Vic Yang <victoryang@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Ready: Tom Wai-Hong Tam <waihong@chromium.org>
Tested-by: Tom Wai-Hong Tam <waihong@chromium.org>
1 file changed