* async-bytecomp.el: Fix callback.
Now we use display-buffer, the buffer is not current, so use
with-current-buffer.
* async-bytecomp.el: Be quiet when compiling for elpa.
* async-bytecomp.el: emacs-24 indent.
* async-bytecomp.el (package--compile): load async-bytecomp.
This is needed when reinstalling async package.