Comment 4 for bug 983805

Updated script: Please discard the previous patch in post #1 and the
full script file in post #2. Instead, use the patch in this post, or the
full script in a following post. This should be good for testing.

[Although the previous version of the script worked in all my tests,
it has a bug which can make it fail if there are symlinks to symlinks.
Also the code is cleaned up: Finding the major:minor numbers
for the device is now done using the busybox builtins stat/printf
instead of chasing through sysfs or /proc/partitions. This makes
it even more close to the original klibc/kinit C program resumelib.c.]
.