changes in sbcl-2.2.10 relative to sbcl-2.2.9:
* platform support:
** win32: improved handling of stack overflow exceptions. (lp#1302866)
** Mac OS X: enforce stronger alignment when building the runtime.
(lp#1991485, reported by Yan)
** arm64: support for building the system without the sb-unicode feature
(i.e. with 8-bit characters) is restored.
* bug fix: do not elide the GC store barrier in closures. (lp#1982608,
reported by Andrew Berkley)
* bug fix: make sb-introspect tests pass when the system is built without
support for source locations. (lp#1635349, reported by Tomas Hlavaty)
* bug fix: erroneous assumption that the format-control of a simple condition
was a string. (lp#1803727)
* bug fix: compiler consistency failure in modular arithmetic widening.
(lp#1990715)
* bug fix: provide a stub for a helper function (lp#1992316)