scripts/gen-dependencies.sh: prevent zero-length dep.* files from accumulating in tmp/

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38860 3c298f89-4303-0410-b956-a3cf2f4a3e73
base-files: add the DEVICENAME variable for hotplug scripts

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38861 3c298f89-4303-0410-b956-a3cf2f4a3e73
procd: emit tty events for ttyUSB* even when they come from the usb-serial subsystem

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38862 3c298f89-4303-0410-b956-a3cf2f4a3e73