scripts: debug output for partitions.

Add more output to help debug partx errors.  Also sync the image file
where that may help.

TEST=unit tests pass

Change-Id: Ibbed570fbc23109ab701cb0db9d750f391294c53
Tested-by: LaMont Jones <>
Commit-Ready: ChromeOS CL Exonerator Bot <>
Legacy-Commit-Queue: Commit Bot <>
Reviewed-by: George Engelbrecht <>
Reviewed-by: Sean Abraham <>
Reviewed-by: Alex Klein <>
3 files changed