fix: expanding relative path in "ppx" property also in toploop


git-svn-id: https://godirepo.camlcity.org/svn/lib-findlib/trunk@223 5e68ba05-c9cc-0310-a7d4-dca2aa431786
doc last change


git-svn-id: https://godirepo.camlcity.org/svn/lib-findlib/trunk@224 5e68ba05-c9cc-0310-a7d4-dca2aa431786