kamctl: option to set store path for rpc commands

utils/kamctl/kamctl.rpcfifo

@@ -130,6 +130,9 @@ rpc_cmd()
 		done
 		CMD="${CMD}]"
 	fi
+	if [ -n "$RPCSTOREPATH" ]; then
+		CMD="${CMD}, \"store_path\": \"${RPCSTOREPATH}\""
+	fi
 	CMD="${CMD}, \"reply_name\": \"${name}\", \"id\": $$}\n"
 
 	trap "rm -f $path; kill 0" 2
@@ -172,6 +175,9 @@ rpc_cmd_print()
 		done
 		CMD="${CMD}]"
 	fi
+	if [ -n "$RPCSTOREPATH" ]; then
+		CMD="${CMD}, \"store_path\": \"${RPCSTOREPATH}\""
+	fi
 	CMD="${CMD}, \"reply_name\": \"${name}\", \"id\": $$}\n"
 
 	minfo "The command is:\n"