meta-facebook: add memory usage warning threshold

Add a log only warning threshold at 70% memory usage.

Signed-off-by: Potin Lai <potin.lai@quantatw.com>
Change-Id: I74c49efeaedacff20f59a646c2a8e37ec76b5e7f
diff --git a/meta-facebook/recipes-phosphor/health/files/bmc_health_config.json b/meta-facebook/recipes-phosphor/health/files/bmc_health_config.json
index 0807bae..2dd2397 100644
--- a/meta-facebook/recipes-phosphor/health/files/bmc_health_config.json
+++ b/meta-facebook/recipes-phosphor/health/files/bmc_health_config.json
@@ -28,6 +28,12 @@
             "Value": 85.0,
             "Log": true,
             "Target": "reboot.target"
+        },
+        "Warning":
+        {
+            "Value": 70.0,
+            "Log": true,
+            "Target": ""
         }
     }
   },