implemented a builtin echo command in ash. moved the guts of the

echo applet into libbb, and now call bb_echo() from both echo.c
and ash.c

libbb/Makefile.in

@@ -46,7 +46,8 @@ LIBBB_SRC:= \
 	get_terminal_width_height.c fclose_nonstdin.c fflush_stdout_and_exit.c \
 	getopt_ulflags.c default_error_retval.c wfopen_input.c speed_table.c \
 	perror_nomsg_and_die.c perror_nomsg.c skip_whitespace.c bb_askpass.c \
-	warn_ignoring_args.c concat_subpath_file.c vfork_daemon_rexec.c
+	warn_ignoring_args.c concat_subpath_file.c vfork_daemon_rexec.c \
+	bb_echo.c
 
 LIBBB_OBJS=$(patsubst %.c,$(LIBBB_DIR)%.o, $(LIBBB_SRC))