- Add upstream patches
* bash52-022
It's possible for readline to try to zero out a line that's not
null-terminated, leading to a memory fault.
* bash52-023
Running `local -' multiple times in a shell function would
overwrite the original saved set of options.
* bash52-024
Fix bug where associative array compound assignment would not
expand tildes in values.
* bash52-025
Make sure a subshell checks for and handles any terminating
signals before exiting (which might have arrived after the
command completed) so the parent and any EXIT trap will see
the correct value for $?.