Add RSGlobalInfoPass information to RS driver.

Bug: 20306487

This change enables vendor drivers to configure support for including
additional information about global variables in the emitted CPU code.
This information includes the number of total global variables, the
names of these variables, the addresses of these variables and the
sizes of these variables. The driver can also select whether the
information includes constant (immutable) globals or not.

The reference driver defaults to embedding information about each of
the existing, non-constant global variables.

Change-Id: I1e55fc3f08e518f04eeee3e4f9dc7b6ea3b80d7c
7 files changed