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Show a more verbose message if BASERUBY is too old #735

Job	Run time
ruby-bench (--warmup=1 --bench=1 --excludes=lobsters)	15m 32s
make (test-bundler-parallel, 50)	24m 13s
make (check, --disable-yjit)	8m 0s
make (check, cppflags=-DVM_CHECK_MODE)	8m 38s
make (check, --enable-shared --enable-load-relative)	8m 43s
make (check, ubuntu-24.04, capi)	9m 58s
make (test-bundled-gems)	18m 54s
make-ibm	0s
make (check, i686)	11m 38s
Ubuntu result	4s
	1h 45m 40s