Docker: Update build image with final OCIOv2, Qt 5.15.2, OTIO, Crashpad (#1489)

* Add missing xcb-util-* packages. Qt's libqxcb.so seems to require them in the newer Qt version

* Adjust breakpad install prefix to match CMake change

* Add build script for Olive for quick testing

* .n in CI image actually stands for image revision

* skipping the CI is now supported natively by GitHub Actions

docker/scripts/build_ffmpeg.sh

@@ -2,7 +2,7 @@
 # Copyright (C) 2020 Olive Team
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-# Largely copied from https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
+# Largely based on https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
 #
 # Uses { command } & pattern for parallelism https://gist.github.com/thenadz/6c0584d42fb007582fbc
 #
@@ -44,6 +44,21 @@ set -ex
 # join jobs, some libs depend on NASM/YASM
 wait
 
+# Set up libaom
+{
+    git clone --depth 1 --branch "${AOM_VERSION}" "https://aomedia.googlesource.com/aom"
+    cd aom
+    mkdir _build
+    cd _build
+    cmake .. \
+      -DCMAKE_INSTALL_PREFIX="${OLIVE_INSTALL_PREFIX}" \
+      -DBUILD_SHARED_LIBS=1
+    cmake --build .
+    cmake --install .
+    cd ../..
+    rm -rf aom
+} &
+
 # Set up libx264
 {
     # TODO: Checkout stable branch instead of master?
@@ -248,12 +263,13 @@ tar xf ffmpeg.tar.xz
 cd ffmpeg*
 
 # TODO: --enable-debug?
-PKG_CONFIG_PATH="/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH" ./configure \
+PKG_CONFIG_PATH="/usr/local/lib/pkgconfig:/usr/local/lib64/pkgconfig:$PKG_CONFIG_PATH" ./configure \
   --disable-doc \
   --disable-ffplay \
   --enable-gpl \
   --enable-version3 \
   --enable-shared \
+  --enable-libaom \
   --enable-libfreetype \
   --enable-libx264 \
   --enable-libx265 \