meta-facebook: bmcweb: enable logging at warning level

We are seeing some crashes in bmcweb on startup with little information
as to why.  Enable warning-level logging to hopefully give some insight.
Info level appears to likely be too chatty.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I37f2834b09c5344f168e29f06199bbe051ebfd39
diff --git a/meta-facebook/recipes-phosphor/interfaces/bmcweb_%.bbappend b/meta-facebook/recipes-phosphor/interfaces/bmcweb_%.bbappend
index 93b7c8a..1f024b9 100644
--- a/meta-facebook/recipes-phosphor/interfaces/bmcweb_%.bbappend
+++ b/meta-facebook/recipes-phosphor/interfaces/bmcweb_%.bbappend
@@ -1,5 +1,6 @@
 EXTRA_OEMESON:append = "\
     -Dredfish-dbus-log=enabled \
+    -Dbmcweb-logging=warning \
 "
 
 PACKAGECONFIG:append = " insecure-redfish-expand"