Add phosphor-gevent recipe

And make it the default for Phosphor.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Change-Id: I531aa457bcc0fae4d4fff833fb1815a12af53edc
diff --git a/common/recipes-phosphor/interfaces/phosphor-gevent/phosphor-gevent.socket b/common/recipes-phosphor/interfaces/phosphor-gevent/phosphor-gevent.socket
new file mode 100644
index 0000000..ed066e6
--- /dev/null
+++ b/common/recipes-phosphor/interfaces/phosphor-gevent/phosphor-gevent.socket
@@ -0,0 +1,9 @@
+[Unit]
+Description=Phosphor Webserver socket
+PartOf=systemd-networkd.service
+
+[Socket]
+ListenStream=443
+
+[Install]
+WantedBy=sockets.target