rsyslog-config: fix compile warnings under -Werror

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I13081a2f5e98a76cbc708ad1c987ee76e311c6ae
diff --git a/phosphor-rsyslog-config/main.cpp b/phosphor-rsyslog-config/main.cpp
index ea0ca03..3a01e8c 100644
--- a/phosphor-rsyslog-config/main.cpp
+++ b/phosphor-rsyslog-config/main.cpp
@@ -4,7 +4,7 @@
 
 #include <sdbusplus/bus.hpp>
 
-int main(int argc, char* argv[])
+int main(int /*argc*/, char* /*argv*/[])
 {
     auto bus = sdbusplus::bus::new_default();