phosphor-networkd: Don't build tests

We don't yet use ptest so we are wasting cycles building tests.

Change-Id: Iecfd2c2fb3af32127757b05fd3fd68e925d25bc7
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-phosphor/recipes-phosphor/network/phosphor-network_git.bb b/meta-phosphor/recipes-phosphor/network/phosphor-network_git.bb
index e1bcb68..35591f4 100644
--- a/meta-phosphor/recipes-phosphor/network/phosphor-network_git.bb
+++ b/meta-phosphor/recipes-phosphor/network/phosphor-network_git.bb
@@ -36,3 +36,5 @@
 
 SYSTEMD_PACKAGES = "${PN}"
 SYSTEMD_SERVICE_${PN} += "xyz.openbmc_project.Network.service"
+
+EXTRA_OEMESON += "-Dtests=disabled"