tools/thermal/thermal-engine: Fix format string bug in thermal-engine

The error message in the daemon() failure path uses %p format specifier
without providing a corresponding pointer argument, resulting in undefined
behavior and printing garbage values.

Replace %p with %m to properly print the errno error message, which is
the intended behavior when daemon() fails.

This fix ensures proper error reporting when daemonization fails.

Signed-off-by: Malaya Kumar Rout <[email protected]>
Signed-off-by: Daniel Lezcano <[email protected]>
Link: https://patch.msgid.link/[email protected]

tools/thermal/thermal-engine/thermal-engine.c

@@ -374,7 +374,7 @@ int main(int argc, char *argv[])
 	}
 
 	if (options.daemonize && daemon(0, 0)) {
-		ERROR("Failed to daemonize: %p\n");
+		ERROR("Failed to daemonize: %m\n");
 		return THERMAL_ENGINE_DAEMON_ERROR;
 	}