RSB: All toolset builds fail on 6.1rc5 looking for texinfo

Summary

Attempting to build tools for rc4, set builder for all architectures failed with this output:

error: no config file found: .../rtems-source-builder/rtems/config/texinfo-1.cfg,.../rtems-source-builder/source-builder/config/texinfo-1.cfg,.../rtems-source-builder/bare/config/texinfo-1.cfg,.../rtems-source-builder/rtems/config/texinfo-1.cfg

Steps to reproduce

Try to build tools on 6rc5.

Pre-set options