Bug 1660336 Provide libva wrapper to run Firefox on systems without libva installed, r=jya

Differential Revision: https://phabricator.services.mozilla.com/D94650

Author: stransky

media/ffvpx/moz.build

@@ -11,3 +11,8 @@ DIRS += [
     'libavutil',
     'libavcodec'
 ]
+
+if CONFIG['MOZ_WAYLAND']:
+    DIRS += [
+        'mozva',
+    ]

media/ffvpx/mozva/moz.build

@@ -0,0 +1,11 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+SOURCES += [
+    'mozva.cpp',
+]
+
+SharedLibrary('mozva')