sbcl: bootstrap x86-64-darwin 1.2.11 -> 2.2.9
sbcl: bootstrap x86-64-darwin 1.2.11 -> 2.2.9

Update the binary used to bootstrap SBCL versions on Darwin (Mac OS) x86-64
systems (i.e. Intel, i.e. non-ARM) from 1.2.11 (released in 2015) to
2.2.9 (released September 2022). Generally, the more recent the bootstrap
binary, the fewer the problems. This bootstrap binary can be used to compile
other SBCL versions (for this target) from source. Those don’t have binary
releases by the SBCL team.

This is useful because building SBCL 2.x from source, using the binary release
of 1.2.11, on this system configuration, ended up in an endless loop. See also
this thread on the Mac ports forum, where people are having the same issue:

https://trac.macports.org/ticket/64621

Now that SBCL has released a more recent binary build for this system, the
problem is solved.

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