[refactor] create "compile-core" task that uses whichever bootstrap-compiler to compile the compiler to whereever specified; test-minify-self has been removed
create 2nd gen for all patterns of compile flags, and for each of them create 3rd gen for every pattern, and compare their outputs
compare the 3rd gen outputs with 2nd gen outputs
Merge branch 'kazuho/experiments/refactor-self-hosting-tests'