core 109.38.00
add 4.01.0beta1 release
Merge pull request #979 from mirage/master

add 4.01.0beta1 release compiler switch
Merge branch 'core-109.38.00' of git://github.com/janestreet/opam-repository into janestreet-core-109.38.00
Merge branch 'master' of github.com:OCamlPro/opam-repository into janestreet-core-109.38.00