Fix a tiny memory leak in the CLI tool

Change-Id: Iec696cb15dcf437f08e1e4f2a5a1faa0df6fd081
Signed-off-by: Richard Hughes <richard@hughsie.com>
Reviewed-on: https://review.coreboot.org/c/30408
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

cli_classic.c

@@ -677,6 +677,7 @@ out:
 
 	layout_cleanup();
 	free(filename);
+	free(fmapfile);
 	free(referencefile);
 	free(layoutfile);
 	free(pparam);