Here's a 'bump' for the gdb-freeplay patch, now featuring
support for reverse debugging.

I have some rough-cut testsuites for reverse-step,
reverse-continue, reverse-finish, and watchpoints and
breakpoints in reverse.  They pass with gdb-freeplay and
with Teawater's native linux record/replay.

They (the tests) are not really ready to submit, but
maybe I'll post them, just to show how reverse debugging
is coming along.