project:app:rkipc:rkipc:Modify udhcpc for silent operation to suppress irrelevant information from being printed to the terminal

project:build.sh:Add support for multiple folders in post overlay
project:cfg:BoardConfig_IPC:Add support for rootfs post overlay
sysdrv:Makefile:Replace the script-based copying method with the post overlay approach

Signed-off-by: luckfox-eng29 <eng29@luckfox.com>

project/cfg/BoardConfig_IPC/overlay/overlay-luckfox-fastboot/etc/fstab

@@ -0,0 +1,7 @@
+# <file system>	<mount pt>	<type>	<options>	<dump>	<pass>
+proc		/proc		proc	defaults	0	0
+devpts		/dev/pts	devpts	defaults,gid=5,mode=620	0	0
+tmpfs		/dev/shm	tmpfs	mode=0777	0	0
+tmpfs		/tmp		tmpfs	mode=1777	0	0
+tmpfs		/run		tmpfs	mode=0755,nosuid,nodev	0	0
+sysfs		/sys		sysfs	defaults	0	0

project/cfg/BoardConfig_IPC/overlay/overlay-luckfox-fastboot/etc/inittab

@@ -0,0 +1,31 @@
+# /etc/inittab
+#
+# Copyright (C) 2001 Erik Andersen <andersen@codepoet.org>
+#
+# Note: BusyBox init doesn't support runlevels.  The runlevels field is
+# completely ignored by BusyBox init. If you want runlevels, use
+# sysvinit.
+#
+# Format for each entry: <id>:<runlevels>:<action>:<process>
+#
+# id        == tty to run on, or empty for /dev/console
+# runlevels == ignored
+# action    == one of sysinit, respawn, askfirst, wait, and once
+# process   == program to run
+
+# Startup the system
+::sysinit:/bin/mount -a 2>/dev/null
+# now run any rc scripts
+::respawn:-/bin/sh
+::sysinit:/etc/init.d/rcS
+
+# Put a getty on the serial port
+#ttyFIQ0::respawn:/sbin/getty -L  ttyFIQ0 0 vt100 # GENERIC_SERIAL
+
+# Stuff to do for the 3-finger salute
+#::ctrlaltdel:/sbin/reboot
+
+# Stuff to do before rebooting
+::shutdown:/etc/init.d/rcK
+::shutdown:/sbin/swapoff -a
+::shutdown:/bin/umount -a -r