rbutil uses several components from the utils folder, and can be
considered part of utils too. Having it in a separate folder is an
arbitrary split that doesn't help anymore these days, so merge them.
This also allows other utils to easily use libtools.make without the
need to navigate to a different folder.
Change-Id: I3fc2f4de19e3e776553efb5dea5f779dfec0dc21
Instead of passing error messages using a callback function (which becomes
awkward when used from a C++ class object) return distinct error codes from
chinachip_patch(). This also removes the kludge to support translations for
Rockbox Utility and moves the strings to translate to the installation class
where they belong.
As a side effect info messages won't be passed to Rockbox Utility anymore, but
the details of the patching progress aren't of that much interest for the user
anyway.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31115 a1c6a512-1295-4272-9138-f99709370657
