[pencil] use #pragma pencil independent instead of #pragma independent
[pencil] use #pragma pencil independent instead of #pragma independent


Former-commit-id: 086c6603db4b31db993c9bcb6d942445d04f3a6d
pencil-language/pencil-benchmark,dividiti/pencil-benchmark,rbaghdadi/pencil-benchmark,dividiti/pencil-benchmark,pencil-language/pencil-benchmark,pencil-language/pencil-benchmark,rbaghdadi/pencil-benchmark,rbaghdadi/pencil-benchmark,dividiti/pencil-benchmark