git: apply config.prefix to paths

see #15: Support configurable PREFIX

git: update to 2.42.0

pigz: Update to 2.8

openbsd: Update to 7.3

zlib: Update to 1.3

yt-dlp: Update to 2023.07.06

sbase: Update to latest git

acpid: Fix build with musl 1.2.4

acpid: Update to 2.0.34

mblaze: Update to latest git

Add bubblewrap 0.8.0

linux-headers: Update to 6.4

strace: Update to 6.4

samurai: Update to latest git

This fixes a broken submodule commit that was accidentally pushed
prematurely in 9324802b6787e96eb7273248321ce10fd9209ca2.

swc: Update to latest git

musl: Update to 1.2.4

transmission: Fix overflow in previous patch

transmission: Tweak default piece sizes

ffmpeg: Enable srt demuxer

ffmpeg: libavcodec needs zlib, too