Run libcore tests for m68k #3122

Job	Run time
build_system	25s
duplicates	4s
spell_check	8s
build (gcc-15.deb, --extended-regex-example-tests)	13m 58s
build (gcc-15.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	13m 5s
build (gcc-15.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	14m 2s
build (gcc-15.deb, --std-tests)	5m 50s
build (gcc-15.deb, --test-libcore)	16m 26s
build (gcc-15.deb, --extended-regex-tests)	11m 50s
build (gcc-15.deb, --extended-rand-tests)	8m 47s
build (gcc-15.deb, --projects)	19m 50s
build (gcc-15-without-int128.deb, --extended-rand-tests)	8m 53s
build (gcc-15-without-int128.deb, --test-libcore)	16m 52s
build (gcc-15-without-int128.deb, --extended-regex-tests)	11m 33s
build (gcc-15-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	16m 2s
build (gcc-15-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	13m 59s
build (gcc-15-without-int128.deb, --projects)	11m 14s
build (gcc-15-without-int128.deb, --extended-regex-example-tests)	6m 33s
build (gcc-15-without-int128.deb, --std-tests)	6m 23s
success	3s
	3h 15m 57s

Provide feedback