message: Support LLVM 17 (current trunk). Note that ISPC doesn't build with 16/17 at the moment
diff: /*
  - Copyright (c) 2015-2022, Intel Corporation
  + Copyright (c) 2015-2023, Intel Corporation
  All rights reserved.
  Redistribution and use in source and binary forms, with or without
  #define ISPC_LLVM_14_0 140000
  #define ISPC_LLVM_15_0 150000
  #define ISPC_LLVM_16_0 160000
  +#define ISPC_LLVM_17_0 170000
  #define OLDEST_SUPPORTED_LLVM ISPC_LLVM_10_0
  -#define LATEST_SUPPORTED_LLVM ISPC_LLVM_16_0
  +#define LATEST_SUPPORTED_LLVM ISPC_LLVM_17_0
  #ifdef __ispc__xstr
  #undef __ispc__xstr
  