luajit: bump new version

* gdb: add mmudata value to lj-gc output
* gdb: unwind Lua stack top part

changelogs/unreleased/luajit-gdb-py-fixes.md

@@ -3,3 +3,6 @@
 * Fixed slots alignment in `lj-stack` command output when `LJ_GC64` is enabled
   (gh-5876).
 * Fixed dummy frame unwinding in `lj-stack` command.
+* Fixed top part of Lua stack (red zone, free slots, top slot) unwinding in
+  `lj-stack` command.
+* Added the value of `g->gc.mmudata` field to `lj-gc` output.

luajit @ 99f1d77d

-Subproject commit 196d4ca81381236d57d7959659b0659ff6be8957
+Subproject commit 99f1d77df8ad39663ee5d00d4f450da4a524ba50