Checksum for GL pipe communication

This is the guest side implementation for cl go/oag/c/207292.

It initializes checksum whenever a renderControl is created. Each
HostConnection owns a checksum structure.

The list contains mostly auto-generated code by emugen.

(cherry picked from commit bfd420ab5f9e0704012b6796522ef78cd56a3ac4)

Change-Id: I2eacc654522f048a82a77803f71116ba58a39e86
25 files changed