研發筆記：開機執行/usr/etc/profile, /usr/etc/inittab,/usr/etc/rcS, /usr/etc/fstab.

busybox的
Busybox Settings --->
General Configuration --->
[*] Startup files in /usr/etc
要勾選，Busybox開機才會執行/usr/etc/profile, /usr/etc/inittab,/usr/etc/rcS, /usr/etc/fstab.