bmc: allow configuring the verification output path

Allow configuring the file checked to determine the status of the
asynchronous image verification process.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: Ia37ed81cd08fa4ce0313092134c476cc42eb8119
diff --git a/main.cpp b/main.cpp
index 4dc8c27..6458b98 100644
--- a/main.cpp
+++ b/main.cpp
@@ -95,7 +95,7 @@
 
     auto handler = blobs::FirmwareBlobHandler::CreateFirmwareBlobHandler(
         sdbusplus::bus::new_default(), blobs::supportedFirmware,
-        blobs::supportedTransports);
+        blobs::supportedTransports, VERIFY_STATUS_FILENAME);
 
     if (!handler)
     {