The MirOS Korn Shell is a quite complete posix shell implementation,
is rather small and supports vi mode properly.
[Peter: use mksh.1 as license file, use TARGET_CONFIGURE_OPTS, install -D]
Signed-off-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>