Bug 1278700 - Add missing libraries to Mac artifact builds to avoid failing in the packager when doing an artifact build on automation. r=mshal

MozReview-Commit-ID: 7wv57TcdLUR

python/mozbuild/mozbuild/artifacts.py

@@ -290,6 +290,8 @@ class MacArtifactJob(ArtifactJob):
                 'libplugin_child_interpose.dylib',
                 # 'libreplace_jemalloc.dylib',
                 # 'libreplace_malloc.dylib',
+                'libmozavutil.dylib',
+                'libmozavcodec.dylib',
                 'libsoftokn3.dylib',
                 'plugin-container.app/Contents/MacOS/plugin-container',
                 'updater.app/Contents/MacOS/org.mozilla.updater',