[BusyBox] builtin echo for ash

[Paul Fox]

 > > one other implementation question:  moving the echo code into
 > > libbb/bb_echo.c now requires that CONFIG_FANCY_ECHO be accessible
 > > from somewhere other than just the coreutils config menu, since
 > > you might want to configure the builtin echo without configuring
 > > the echo applet.  i wasn't sure how to handle this, so i simply
 > > duplicated the CONFIG_FANCY_ECHO option into the ash config menu.
 > > this isn't right -- what should i do instead?
 > 
 > i dont think the duplication will be that big of a deal ... but i dont know 
 > kconfig will handle it :)

busybox menuconfig handles it surprisingly well -- not only does
it only emit one instance of the option, but it's impossible to
set the two instances of the option to different values.  whether
it was intentional or not, it's exactly the right behavior.  i just
don't like duplicating the menu text in two places.

paul
=---------------------
 paul fox, pgf at brightstareng.com