tcpdump: fix build with ipv6 after 2a10c9 (pass --enable-ipv6 to autotargets configure)

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/tcpdump/tcpdump.mk

@@ -9,7 +9,7 @@
 TCPDUMP_VERSION = 4.2.1
 TCPDUMP_SITE = http://www.tcpdump.org/release
 TCPDUMP_SOURCE = tcpdump-$(TCPDUMP_VERSION).tar.gz
-TCPDUMP_CONF_ENV = ac_cv_linux_vers=2
+TCPDUMP_CONF_ENV = ac_cv_linux_vers=2 td_cv_buggygetaddrinfo=no
 TCPDUMP_CONF_OPT = --without-crypto \
 		$(if $(BR2_PACKAGE_TCPDUMP_SMB),--enable-smb,--disable-smb)
 TCPDUMP_DEPENDENCIES = zlib libpcap