x264-debian-unstable: Add aarch64 cross compilers and qemu

This allows testing aarch64 SVE with varying vector lengths.

x264-debian-unstable/Dockerfile

@@ -2,7 +2,7 @@ FROM debian:sid-20231030-slim
 
 MAINTAINER VideoLAN roots <roots@videolan.org>
 
-ENV IMAGE_DATE=202112061500
+ENV IMAGE_DATE=202311092200
 
 # If someone wants to use VideoLAN docker images on a local machine and does
 # not want to be disturbed by the videolan user, we should not take an uid/gid
@@ -20,7 +20,9 @@ RUN groupadd --gid ${VIDEOLAN_UID} videolan && \
       lftp gcc make git curl nasm wine wine32 wine64 procps \
       ca-certificates libc-dev bzip2 \
       gcc-mingw-w64-x86-64 g++-mingw-w64-x86-64 \
-      gcc-mingw-w64-i686 g++-mingw-w64-i686 mingw-w64-tools && \
+      gcc-mingw-w64-i686 g++-mingw-w64-i686 mingw-w64-tools \
+      gcc-aarch64-linux-gnu g++-aarch64-linux-gnu libc6-dev-arm64-cross \
+      qemu-user && \
     apt-get clean -y && rm -rf /var/lib/apt/lists/*
 
 USER videolan