sde-build-pkg: set optimization to lazy (-O) when -d is given

scripts/Build-Pkg

@@ -102,7 +102,12 @@ fi
 . lib/functions.in
 . lib/parse-config
 
-[ -z "$build_debug" ] || export "SDECFG_DEBUG=$build_debug"
+if [ "$build_debug" = 1 ]; then
+	echo_warning 'Forcing debug mode'
+	export SDECFG_DEBUG=1
+	export SDECFG_OPT=lazy
+fi
+
 [ -z "$build_parallel" ] || export "SDECFG_PARALLEL_MAX=$build_parallel"
 
 if [ -z "$root" -a $stagelevel -le 1 ] ||