procfs: retrieve both RS tables from RS at once

procfs: retrieve both RS tables from RS at once

Previously, procfs would retrieve the rproc and rprocpub tables from
RS in two separate calls.  This allowed for a race condition where the
tables could change in between the calls, resulting in a panic in
procfs under certain circumstances.  RS now implements a new method
for getsysinfo that allows the retrieval of both tables at once.

Change-Id: I5ec22d25898361270c90e805a43fc6d76ad9e29d