Don't override target passed on command-line with target from sysimg

src/codegen.cpp

@@ -7712,7 +7712,7 @@ extern "C" void jl_init_llvm(void)
  std::unique_ptr<MCSubtargetInfo> MSTI(
  TheTarget->createMCSubtargetInfo(TheTriple.str(), "", ""));
  if (!MSTI->isCPUStringValid(TheCPU))
- jl_errorf("Invalid CPU name %s.", TheCPU.c_str());
+ jl_errorf("Invalid CPU name \"%s\".", TheCPU.c_str());
  if (jl_processor_print_help) {
  // This is the only way I can find to print the help message once.
  // It'll be nice if we can iterate through the features and print our own help

src/processor_fallback.cpp

@@ -47,7 +47,6 @@ static uint32_t sysimg_init_cb(const void *id)
  best_idx = i;
  }
  }
- target = sysimg[best_idx];
  jit_targets.push_back(std::move(target));
  return best_idx;
 }