[Bug target/122613] Passing --enable-as-accelerator-for= stops creation of nvtpx-none-cc

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122613

--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
Guess this comes from:
```
if test x"$enable_as_accelerator_for" != x; then
  AC_DEFINE(ACCEL_COMPILER, 1,
    [Define if this compiler should be built as the offload target compiler.])
  enable_as_accelerator=yes
 
sedscript="s#${target_noncanonical}#${enable_as_accelerator_for}-accel-${target_noncanonical}#"
  program_transform_name=`echo $program_transform_name | sed $sedscript`
  accel_dir_suffix=/accel/${target_noncanonical}
  real_target_noncanonical=${enable_as_accelerator_for}
fi
```