tcpdump: bump to version 4.7.4

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/tcpdump/tcpdump.hash

@@ -1,2 +1,2 @@
 # Locally calculated after checking pgp signature
-sha256	1f87fb652ce996d41e7a06c601bc6ea29b13fee922945b23770c29490f1d8ace	tcpdump-4.7.3.tar.gz
+sha256	6be520269a89036f99c0b2126713a60965953eab921002b07608ccfc0c47d9af	tcpdump-4.7.4.tar.gz

package/tcpdump/tcpdump.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-TCPDUMP_VERSION = 4.7.3
+TCPDUMP_VERSION = 4.7.4
 TCPDUMP_SITE = http://www.tcpdump.org/release
 TCPDUMP_LICENSE = BSD-3c
 TCPDUMP_LICENSE_FILES = LICENSE