dhcpdump: Fix patch file name
Use the naming convention for patches, which is:
<packagename>-<number>-<description>.patch
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Benoît Thébaudeau