libpcap: Update from 1.7.4 to 1.8.1

packages/libpcap/build.sh

@@ -1,7 +1,8 @@
 TERMUX_PKG_HOMEPAGE=http://www.tcpdump.org/
 TERMUX_PKG_DESCRIPTION="Library for network traffic capture"
-TERMUX_PKG_VERSION=1.7.4
+TERMUX_PKG_VERSION=1.8.1
 TERMUX_PKG_SRCURL=http://www.tcpdump.org/release/libpcap-${TERMUX_PKG_VERSION}.tar.gz
+TERMUX_PKG_SHA256=673dbc69fdc3f5a86fb5759ab19899039a8e5e6c631749e48dcd9c6f0c83541e
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--with-pcap=linux"
 TERMUX_PKG_RM_AFTER_INSTALL="bin/pcap-config share/man/man1/pcap-config.1"
 TERMUX_PKG_BUILD_IN_SRC="yes"