Refine Pipeline dump
Refine Pipeline dump

1. Add hash for each symbol during dump
- It is useful for statistic the unique value in all pipeline dump
2. Support '\0' in OutputText
 - In original code,  OutputText will stop output if it hits '\0', even the pos of '\0' isn't equal with endpos.

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