Fixed cmake llpc build to not need pal
Fixed cmake llpc build to not need pal

Change-Id: I8d894ced7eb651762c8310322e41e4d124163986

GPUOpen-Drivers/llpc,googlestadia/llpc,googlestadia/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc,googlestadia/llpc,GPUOpen-Drivers/llpc,googlestadia/llpc,googlestadia/llpc