Bug#1067644: gcc-12: BD-Uninstallable on m68k due to gnat-11 vs gnat-12

[Thorsten Glaser]

Source: gcc-12
Version: 12.3.0-15

gcc-12 is BD-Uninstallable on m68k due to missing gnat-11
but gnat-12 is present and could probably be used, at least
in a “gnat-11 | gnat-12” alternative dependency maybe?