default.mspec: remove useless flags
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58949 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
default.mspec: remove useless flags
existent paths from flags. there is no library scripts and .ext
directory in the source directory.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58949 b2dd03c8-39d4-4d8f-98ff-823fe69b080e