configure.in: escape

* configure.in (unexpand_shvar): escape $.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40756 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
loadpath.c: split

* loadpath.c: split load path staffs from version.c.
* dmyloadpath.c: miniruby has no builtin load paths, so verconf.h is
  not needed.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40757 b2dd03c8-39d4-4d8f-98ff-823fe69b080e