entity-manager: add `fan1_Name` to the legacy json schema.

PSUSensor already supports renaming the fan sensors. However, schema
validation fails at build time because of the undefined token.

Change-Id: I2faadf8f04f5ca544bbf66b6baa9d576166bf63c
Signed-off-by: Ali El-Haj-Mahmoud <aaelhaj@google.com>
diff --git a/schemas/legacy.json b/schemas/legacy.json
index 2ed6ffe..5a616d3 100644
--- a/schemas/legacy.json
+++ b/schemas/legacy.json
@@ -468,6 +468,9 @@
                 "vout17_Name": {
                     "$ref": "#/definitions/Types/vout17_Name"
                 },
+                "fan1_Name": {
+                    "$ref": "#/definitions/Types/fan1_Name"
+                },
                 "iout1_Offset": {
                     "$ref": "#/definitions/Types/iout1_Offset"
                 },
@@ -1023,6 +1026,9 @@
             "vout17_Name": {
                 "type": "string"
             },
+            "fan1_Name": {
+                "type": "string"
+            },
             "iout1_Offset": {
                 "type": "number"
             },