fix: Switch to space-separated sources.conf format

- Change from colon to space separation to avoid URL parsing issues
- Update sources.conf format: TYPE NAME URL VERSION BUILD_FUNCTION [EXTRA]
- Implement awk-based parsing for reliable field extraction
- Fix firmware package list (remove unavailable linux-firmware-marvell)

initramfs/usr/bin/ldd

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec /lib/ld-musl-x86_64.so.1 --list "$@"