allowing to disable camlp4 (-no-camlp4) (Thomas Gazagnaire)


git-svn-id: https://godirepo.camlcity.org/svn/lib-findlib/trunk@207 5e68ba05-c9cc-0310-a7d4-dca2aa431786
whitequark's fixes for "bytes" package


git-svn-id: https://godirepo.camlcity.org/svn/lib-findlib/trunk@208 5e68ba05-c9cc-0310-a7d4-dca2aa431786