Log Message:
ckmame: update to 1.1.

1.1 (2021-06-28)
=================
* Read-only 7z support.
* Improve detector support.
* Bump mamedb version. All mame.db files need to be regenerated.
* Follow MAME in expecting disk images in subdirectories.
* Remove broken support for checking samples.
* Convert to C++17.