vcsm find_library fix

adding VCSM avaliability check. Compatibilization with ARM64

Small fixes and improvements

Fix CircleCI script

Fix v3d_info program for emulated "system"

Dynamically resolve firmware library functions

Move CI package to Buster

Fix by-value kernel arguments and some logging messages

Update Readme and build options

Build CI packages with optimizations

Small improvements

Switch to new VC4C compiler interface

Add support for work-group merge factor and some smaller fixes

Fix CI compilation errors and some improvements

Fix some compilation errors and warnings