Enable basic Runtime Management System (RMS)

The goal of these initial changes is to get the shared memory
segment created, build and start the persistent server processes
mxssmp and mxsscp, make EXE processes register in the shared segment
and let mxssmp cleanup the shared segment as the processes stop.
Later I will address specific features of RMS that support
Query Invalidation.

Change-Id: Ib3dd10525b6073d32d1e362f301afe9c88012647
Implements: blueprint enable-rms-infrastructure
Merge "Enable basic Runtime Management System (RMS)"