Correct the known-good commit value

The `STABLE` variable in the Makefile and the generation tooling pointed to the commit after the one which was the latest known-good point. This commit points them back to the appropriate commit, with the right version number.

Note that this requires correcting the installation of the dist on the pdx server, removing 0.0.9.2105 and replacing it with a build of 0.0.9.2014. Following this, the build process with tarball-bootstrap should work correctly again.