base_image_util.sh: less debug output.

Add set +x at the end of the function....

BUG=chromium:1016021, chromium:1011891
TEST=unittests pass

Change-Id: Ic08396ac814760d12a5f52a3f67562c0924ec99d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/1872374
Tested-by: LaMont Jones <lamontjones@chromium.org>
Auto-Submit: LaMont Jones <lamontjones@chromium.org>
Reviewed-by: Alex Klein <saklein@chromium.org>
Commit-Queue: Alex Klein <saklein@chromium.org>
2 files changed