This implements the compute related part of vkCmdPipelineBarrier(). Two more MRs will follow this to add the graphics related code and finally the sync stuff.
Note that this breaks the triangle demo upstream due to the missing idfwdf binary blob setup at device creation time. This will should eventually be fixed by the compiler generating it.
/cc @frankbinns , @rajnesh-kanwal
Signed-off-by: Karmjit Mahil Karmjit.Mahil@imgtec.com