init applet uses "nit" identity in syslog instead of "init"

[Ron Yorston]

Deweloper wrote:
>BTW. busybox doesn't link after "make allnoconfig" and enabling just
>"init" applet in "make menuconfig":

There are two issues here:

- ash is being built when 'allnoconfig' is selected because SH_IS_ASH
  is selected by default;

- recent changes to ash cause the build to fail if the 'command'
  built-in is disabled, as it is with 'allnoconfig'.

A patch to fix the second issue follows.

Ron