Print failing object path after failed bus lookup

Change-Id: I599d8297b4d2fd45831443685ea5b7d53f1515b6
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/host-services.c b/host-services.c
index 4c8fc7c..b0b12ae 100644
--- a/host-services.c
+++ b/host-services.c
@@ -45,7 +45,8 @@
     sd_bus *bus = ipmid_get_sd_bus_connection();
     rc = mapper_get_service(bus, object_name, &bus_name);
     if (rc < 0) {
-        fprintf(stderr, "Failed to get bus name, return value: %s.\n", strerror(-rc));
+        fprintf(stderr, "Failed to get %s bus name: %s\n",
+                object_name, strerror(-rc));
         goto finish;
     }
     rc = sd_bus_call_method(bus,             // In the System Bus