external: pull libwidevinecdm0 for noble from liujianfeng1994 rockchip-multimedia PPA

[igorpecovnik]

Summary

Adds Widevine CDM — the Chromium content-decryption module used for DRM-protected streams (Netflix, Spotify web, etc.) — to the external download matrix for noble.

liujianfeng1994's rockchip-multimedia PPA publishes libwidevinecdm0 4.10.2662.3+1+noble3 for arm64 and armhf on noble. amd64 isn't built there (desktop amd64 users get Widevine via Google Chrome directly, so no Armbian-mirrored copy is needed).

Ref: armbian/configng#878

File

external/widevine-noble.conf:

URL=https://ppa.launchpadcontent.net/liujianfeng1994/rockchip-multimedia/ubuntu
KEY=noble
RELEASE=noble
TARGET=desktop
METHOD=aptly
INSTALL=libwidevinecdm0
GLOB="Name (% libwidevinecdm0)"
ARCH=arm64:armhf
REPOSITORY=BS

• ARCH=arm64:armhf matches what the PPA actually publishes, so no matrix slot tries to pull a non-existent .deb.
• Keyring already ships as external/keys/liu.gpg — same PPA owner's chromium-ubuntu repo is already consumed via harfbuzz-jammy.conf and unudhcpd.conf, so no new key needed.
• KEY=noble matches the suite name of the PPA (Launchpad PPAs name suites after the Ubuntu release).

Test plan

• curl … Packages.gz against the PPA confirms libwidevinecdm0 4.10.2662.3+1+noble3 exists for arm64 + armhf on noble, and is NOT built for amd64.
• Next Infrastructure: APT repositories update run with download_external=true picks the new conf up and mirrors libwidevinecdm0 into debs-beta / debs.
• Post-sync: apt-cache policy libwidevinecdm0 on a noble/arm64 Armbian install shows apt.armbian.com as a candidate.