meta-phosphor: libmctp: add capture

Packet capture support was recently added to libmctp.  Add a
PACKAGECONFIG for that.

Change-Id: Ibcd4d69b4622887659cc360e215e70963cd20b6c
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/recipes-phosphor/libmctp/libmctp_git.bb b/meta-phosphor/recipes-phosphor/libmctp/libmctp_git.bb
index 29cc220..ddb5e15 100644
--- a/meta-phosphor/recipes-phosphor/libmctp/libmctp_git.bb
+++ b/meta-phosphor/recipes-phosphor/libmctp/libmctp_git.bb
@@ -26,6 +26,7 @@
                           --without-systemdsystemunitdir,systemd"
 
 PACKAGECONFIG[astlpc-raw-kcs] = "--enable-astlpc-raw-kcs,--disable-astlpc-raw-kcs,udev,udev"
+PACKAGECONFIG[pcap] = "--enable-capture,--disable-capture,libpcap,"
 
 CONFFILES:${PN} = "${sysconfdir}/default/mctp"