android_mtdutils: Return current offset after seek

mtd_read_skip_to is just a wrapper around lseek64. Let's return some
value to the caller instead of ignoring it.

BUG=chromium:426742
TEST=emerge android_mtdutils

Change-Id: I3ba048859faf625751a09f5d6b7f910a990bf17e
Reviewed-on: https://chromium-review.googlesource.com/234455
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Nam Nguyen <namnguyen@chromium.org>
Trybot-Ready: Nam Nguyen <namnguyen@chromium.org>
Tested-by: Nam Nguyen <namnguyen@chromium.org>
2 files changed