message: Updated list of supported LLVM versions in ispc.h
diff: #include "ispc_version.h"
  -#if ISPC_LLVM_VERSION < OLDEST_SUPPORTED_LLVM || ISPC_LLVM_VERSION > LATEST_SUPPORTED_LLVM
  -#error "Only LLVM 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 5.0, 6.0, 7.0 and 8.0 development branch are supported"
  +#if ISPC_LLVM_VERSION < OLDEST_SUPPORTED_LLVM || \
  + ISPC_LLVM_VERSION > LATEST_SUPPORTED_LLVM
  +#error \
  + "Only LLVM 3.2 - 8.0 and 9.0 development branch are supported"
  #endif
  #if defined(_WIN32) || defined(_WIN64)
  