Fix frame traversal for backtraces.
Recent GCC versions need more memory.
Fix quoting in xedkbuild.bat.
FFI: Fix argument checks for ffi.string().
FFI/x64: Fix passing of vector arguments to calls.
DynASM: Emit #line <n> <file> instead of #<n> <file>.
Fix snapshot restore for exit to function header.
Fix ABC elimination.
Check for MAP_32BIT presence instead of checking for Linux.
FFI: Rehash finalizer table after GC cycle, if needed.
Fix line number for relocated bytecode after closure fixup.
Check for failure to mark memory as executable (restricted kernels).
Fix handling of redundant PHIs.
Fix GC steps threshold handling when called by JIT-compiled code.

Thanks to Cheng, Long.
Fix for last commit
Fix type punning alias analysis for constified pointers.
FFI: Clarify ffi.cdef behavior.
Improve msvcbuild.bat static linking.
Follow-up fix for GC step threshold fix.
Respect jit.off(func) when returning to a function, too.