Better handling for the process info array

We have phones that have more than 256 PIDs running at one time right
now, so don't segmentation fault when that condition happens.

Free all proc info after it ahs been used.

Also if a process goes away before we read its process name, just print
"<unknown>" instead.

Change-Id: Ia3899be61b047852f62bf3cc6f30eb2fcd797a61
2 files changed