These patches fix some minor problems with GNU Readline package.

 patch-1 will make the package selection default=n (since it's not necessary)
 patch-2 will fix the readline.mk makefile to better follow buildroot style.

This is a cleanup only. But adds the 'readline-target' makefile target to also
install readline .so files to the target in addition to the full install in the
staging area.

http://bugs.busybox.net/view.php?id=300