bsp: Allow for arguments in passwd function

Previously, we have added a passwd function to our shell which executes
passwd and restarts uhttpd afterwards, so the WebUI password is updated.

This adds the ability to still pass command-line arguments to passwd.

The quoting of the shell variable $@ is special:
"$@" expands to "$1" "$2" .., so its use is correct here.

Fixes: #117

Signed-off-by: Fabian Bläse <fabian@blaese.de>
Reviewed-by: Robert Langhammer <rlanghammer@web.de>

bsp/default/root_file_system/etc/profile

@@ -14,7 +14,7 @@ export HOME=${HOME:-/root}
 [ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
 
 # update uhttpd passwd on passwd-change
-[ -e /etc/rc.d/S50uhttpd ] && passwd() { /bin/passwd && /etc/init.d/uhttpd restart; }
+[ -e /etc/rc.d/S50uhttpd ] && passwd() { /bin/passwd "$@" && /etc/init.d/uhttpd restart; }
 
 # I'm lazy, let's add some aliases
 alias ..='cd ..'